Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd799f9a366c119f…

MALICIOUS

PDF

136.1 KB Created: 2021-05-13 16:33:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 33b14a92b4319142cd72b7b97ab0b7bb SHA-1: a6973bc8aa35d331897c625d53c4accc60358899 SHA-256: cd799f9a366c119feb032f02162b5da0cfc38932484deae2d249a9193cd3391f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The primary purpose seems to be directing users to external URLs, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://drafthe.ru/uplcv?utm_term=jual+avanza+veloz+2015+manual PDF link annotation
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/4383d6def2a0a0a8a83f05d3a8aade37/3175338827.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/4ea006f4d977a35a9dd6c04a772493ee/bezazutiku.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4df5292b3e230172ce2279bf4d4ebb48/95710496366.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16099ed9fb4894---lukopekugi.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/fc880732fc8a7ab976dbd83bcd98b401/zubazikewuf.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609382ccb7b9c---24314558234.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/61c0cda4b3a75ae1a6e19115b6b09627/58693635948.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/602f696e2052437c03b367e5fed9d048/95943047082.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e98fb673c---xosirepefepuvatexapamosi.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/5969e2db4dd83816f27b9d53f3f3e42d/lavamajujugapusotonavin.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/gakisadariz.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5307158a---45807668144.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96febec3d---88209129618.pdfIn PDF document text
    • https://efnnma.org/files/file/9260035115.pdfIn PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/j1k1oatja6iuki6sheigogop1q/32625139636.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/397384d5c6111cd652c4e1f73165256b/36903877826.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn 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://www.gnu.org/licenses/gpl.htmlIn 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_off0001735e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1735E 16364 bytes
SHA-256: 05662e655e093ca246dae51e2047ca8933567a1901bfbad30614bd7aaada7f77
font_01_sfnt_off0001a7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7E1 5104 bytes
SHA-256: cab85ee5e4d28606a0a422be55766244ff319aa33f3f3c30374f9d74fa1ef84e
font_02_sfnt_off0001b944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B944 10204 bytes
SHA-256: 2f424bb2bbd0963cc1b84752f8bf593f2609134fab7c5678ce1634c89dc14264
font_03_sfnt_off0001d5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5B9 11908 bytes
SHA-256: 771770761e26f1bd21a8eb1ee0eaaa2b0bbfacfd58233b3cc1e14ec31de28944
font_04_sfnt_off0001fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD6E 16060 bytes
SHA-256: 84d5bd19c210eb3b73ecc14096ab1e56fdfb5b80ce7ba4f0052c67c0c2b02727

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