Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e77f15b75200fde…

MALICIOUS

PDF

94.0 KB Created: 2021-06-20 01:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 50ee158471f0d45dbbd6c917d459d84a SHA-1: 1fa843da014644507bd386cabe8ca457d464d355 SHA-256: 3e77f15b75200fde16ba7bc70be8139f19e4be370e8ce6c30cdd175c5aae9305
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 0.9995

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://infrive.ru/uplcv?utm_term=tony+montana+suga+ft+jimin+mp3+download PDF link annotation
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084396a72b2f---38334393823.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/togakufe.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e5f39428f376ea96ad083969d4e19763/45116088932.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/xebesapugopaxok.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/1let5jk59dtbr2tcu4tpic7m7d/12780562671.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/843d7adcb2c8e39e3f2f11d996dfabb6/20512703133.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c29559cf907---zusedenokopedorom.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c84363b777---66529138300.pdfIn PDF document text
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/d3dac06080cf0dbddb4306e5a6276c9e/wudovokedov.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b53856ed2ed---43174032891.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/760882093.pdfIn PDF document text
    • http://ciskmv.com/css/file/keziburojanofu.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/df72244e7ae75f6eb0aa07e51d916cc7/dezemidabufuz.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/qd5o2trdjkpjsf1gitc4h9j1v2/92135495623.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/50625914665.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/435ebf3c7af6cd720f446584e1d784e7/52744024408.pdfIn PDF document text
    • http://artospace.com/pics/file/tabadivida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89C 13668 bytes
SHA-256: 5e149699334807d62f8c43a1eec757efe3bae6f85da8abc4215501077e01250a
font_01_sfnt_off0000f563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF563 5648 bytes
SHA-256: c53dc2c191cb524c710fb45bbb96d0d0839535d5aad6bf7adae5d40261913aa8
font_02_sfnt_off000108a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A8 3612 bytes
SHA-256: 554b1076e3c74ba0a6b92bea9035571cc677cfecfce9f3c2639fcdae06ff0de7
font_03_sfnt_off00011753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11753 16436 bytes
SHA-256: 9cdc9020391f6fa2b725ce7ff680529227ccb6e10a9f9789fac96a188bfd728b
font_04_sfnt_off00014849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14849 20076 bytes
SHA-256: 0d53997231f5645425afc42fa83c406f88740b410e79d2d6dcfca743ff42169f

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