Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0e70a0d5630e42…

MALICIOUS

PDF

77.1 KB Created: 2021-09-17 12:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 975ac8d522254628fc309808f3ff9796 SHA-1: 76d374c0cd9362964a340a4853238c9e727233cc SHA-256: 2e0e70a0d5630e42db0c6bc99756dfbb5f9091f4768c18688f4b4dbf67978657
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to various websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. The file's structure suggests it's designed to act as a link farm, potentially to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://philabc.ru/uplcv?utm_term=best+m4a+player+for+android PDF link annotation
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1614254e765f4c---jalupopifuvebafewobepo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143b232cd405---fizezaj.pdfIn PDF document text
    • https://giaynangchieucao.com/userfiles/file/judojase.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6aa63ec88---wobobavidovibimegoxoge.pdfIn PDF document text
    • http://myphamasia.net/upload/files/pilumevotixisozulinupido.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/30314266912.pdfIn PDF document text
    • https://travellifeafrica.com/ci/userfiles/files/devuvikidoxuwepijowiza.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/pemejukobew.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/ruzekeki.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16134d28a541c2---pezudibedoxetasovute.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/tenusawub.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/16138a4513e3a5---rabelim.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/7411581868.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/pevabadebavawuxajifexuw.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/94908410107.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/ruxoxatosewagewazun.pdfIn PDF document text
    • http://administratieindex.nl/images/uploads/2767150362.pdfIn PDF document text
    • http://zuche0551.com/upload/file/fejewesekafo.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/41005004106.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/xivipawirivapemibifamuzul.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/32171301366.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6fb254239e2342f49cf173d6fb080522/witet.pdfIn PDF document text
    • http://midel.me/userfiles/file/nukigevavixakitawudizegaz.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/25934642238.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/79634158245.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432caeedef4---zusixabamateguxavuga.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_off0000c7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE007 10904 bytes
SHA-256: 32fe6de4bb873a8bf0943ed2ef18fb59bf453c611c6ad8e248c2017d136fe832
font_02_sfnt_off0000f94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94C 17528 bytes
SHA-256: 82dd863419477d47c9fe4020139b41fef1d58065d327a52e06905a0eb4401ee0

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