Malicious PDF — malware analysis report

Static analysis result for SHA-256 4854a2000e353e1f…

MALICIOUS

PDF

120.8 KB Created: 2021-06-23 22:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 46627879fede6a5d9c20f4e406741c0b SHA-1: 2dd4aaa19b4ba27cbe6b03f75a3d209254a5a944 SHA-256: 4854a2000e353e1fa008340d6f2931b075b397011c917b7718c6c57ff46149f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/dd014def6f0ce7a90d5f38a44a2a6b35/nonobe.pdf In PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4efdee6c---kexobowugipakixerefera.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/412cvp7isvbqh37rnd80hue9gq/46045725975.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/fjm3n3t9f76ev3j8jcstn1i69c/vebomovojiwixakupezelux.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/at68j7nt4h8dmknsqb1eef4ijn/laduxetabezerujamarup.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/lfgp9efmtj6vne8oiek7m51uq6/72021908861.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b1d31613---61698181690.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a799c43876c---xunetajanexukigatida.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/1da73219f48cf6628af09cdbd2f7f5d6/liwakujo.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99e321a824---nolotazabakonotifixume.pdfIn PDF document text
    • http://jubileejec.com/userfiles/files/72221102828.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607188a7cfe66---zelezaxupulobanumixome.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/pawugenewosadobudorazu.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/66qkfqf6grvc7c1ue3ibadf7er/88992392483.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4664cccfda---punokeliwowij.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086244c774ca---39598332235.pdfIn PDF document text
    • http://xaydungphongphu.com/uploads/files/72078003668.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=dank+bot+discordPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE906 10548 bytes
SHA-256: 4b4fb27a7a3e0cd33a966f5eda72a6fa5e81f20849b3e4f81b71fd3b615950ba
font_01_sfnt_off000105bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BF 2904 bytes
SHA-256: db44908fc6c299fcd599fa8180fd4a709cd8bd95cc7fb81dad81128776bf45b5
font_02_sfnt_off0001100d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100D 5104 bytes
SHA-256: 32deded7ec73be266f399cd53f469814b50039705cf3a917e66e190eec26a82c
font_03_sfnt_off0001217e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217E 9872 bytes
SHA-256: 54915fcbf336f8b27d3d3ee0b72428b799a47589267a02861a935303d29ea9b8
font_04_sfnt_off0001347f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1347F 13160 bytes
SHA-256: 2be067c9569c4382c470aac4f2a10e11e37b7aa088e3a89944d914828e5a5879
font_05_sfnt_off00015c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C55 12464 bytes
SHA-256: 53ecfee0c2f6faa88d6f31f09c87be011d0f593ea78f9beee63ddc43f7767ba2
font_06_sfnt_off000186f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186F1 19388 bytes
SHA-256: 4f4f35d826802ccc7bfe414cddf1545af0feb01c671aa0791912f853a78f5101
font_07_sfnt_off0001a6d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6D7 17468 bytes
SHA-256: 461b8064e2d5eb5591561da327d183324caf16c6e14ed7492ec80665de22f3c7
font_08_sfnt_off0001c038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C038 1736 bytes
SHA-256: 551918360585b1590efa6fd2a215345b2f702067d151a0e4b48cfa7490b57960
font_09_sfnt_off0001c7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C7B5 2004 bytes
SHA-256: a4f0b345333209f3bc75afa194d78500ebe2621d20adb7b4de5beade7d54756e

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