Malicious PDF — malware analysis report

Static analysis result for SHA-256 0274bb5b2c27c3c7…

MALICIOUS

PDF

76.5 KB Created: 2021-09-09 04:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 2cfecb399fdf8cf305145895b4f1c6fc SHA-1: cd6309cce15b080e25c530fd5fdb14f572dc1ac0 SHA-256: 0274bb5b2c27c3c72c0a600c0882ba9b4fce7ec0f2afda9aa714b13c31a7c379
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=my+robux+vip+free PDF link annotation
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613670d8c8701---772811904.pdfIn PDF document text
    • http://tutek.eu/userfiles/file/97131991078.pdfIn PDF document text
    • https://granitnet.hu/editor_up/xawan.pdfIn PDF document text
    • http://bojovesporty.cz/userfiles/file/kamirotoxanoxila.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/delanotekagopiziv.pdfIn PDF document text
    • http://w.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/pesuretemagopokuzuma.pdfIn PDF document text
    • http://farmaciafasolis.eu/userfiles/files/17920120000.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210903034923.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/53318333524.pdfIn PDF document text
    • https://lmcmanager.com/ckfinder/userfiles/files/8972345620.pdfIn PDF document text
    • http://tdsns.ru/userfiles/file/81764286442.pdfIn PDF document text
    • http://z-him.ru/userfiles/file/nevitigamoparesobogetami.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/76181107540.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/rimerelanagonunekaga.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/94117230957.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/9bd18939ef08a0332ab5b2dc879ae0d7/97599629077.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/binijijuwimezasupixixoso.pdfIn PDF document text
    • http://djpress.pl/Image/files/zidusefijowuzugef.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/dovagutuguz.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/7848940375.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/xanibuxif.pdfIn PDF document text
    • https://servicepapik.ro/files/7314597117.pdfIn PDF document text
    • https://papersacksfactory.ae/images/bulk_images/files/59278527438.pdfIn PDF document text
    • http://tomei4x4.jp/js/upload/files/gumevuputegofaxularax.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60A 10288 bytes
SHA-256: 673f7c3646409b2ebc86b203d9cc5226c03fc5a47e86bead3268a99aa6884425
font_01_sfnt_off0000dd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1C 17896 bytes
SHA-256: 11e34162ef5fce21e1076b4d8f193a6f1f1198fc6455b62424ae33d55ad162d7
font_02_sfnt_off00010bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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