Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2cb2af907ad56d…

MALICIOUS

PDF

105.5 KB Created: 2021-09-01 02:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d414a213080a6664610c0359d4b61bf SHA-1: 4ce34466a637cafc34128979f54c684f8e5e66b7 SHA-256: 6a2cb2af907ad56dd66f9cc7f4a1a251c929a45f7ede8d8a9f3f8507a7c50766
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan distribution vehicle. It functions as a link farm, containing numerous URLs that point to external websites, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to malicious content or phishing sites, leveraging the numerous embedded URLs for this redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://allytemp.ru/uplcv?utm_term=viruses+that+can+reinfect PDF link annotation
    • http://gotween.com/userfiles/file///1531316406.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/10275576124.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/52031328843.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/0f7444b61c56235a953d252cf5fde44a/rafetiwupebutidalumovisog.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/wuvotebivu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/85226b0a88f1ad114f08e5f1f5523a74/15104576113.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860060219eb---92450953791.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/43206360268.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/89306896660.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24abcdb7dd---mifosewasasedegi.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/86998494002.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/62347127850.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/7880149970.pdfIn PDF document text
    • http://kfbi.ru/content/file/koxarewox.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/ib923ik8k9uc20d1n0pmdjqqij/vajematovopidopigifufa.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/25n2b6kg2gtamij5qui25995jo/xuriboleregusagoxob.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/4cmv9am6jpl7uim3qdbs8pb045/46100398762.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d077e81de54---9688002841.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/5a475793e38c821e601b079efd05bcf4/6768974154.pdfIn PDF document text
    • http://www.polni.si/Images/files/dawevobiz.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/99c08dc756f5b2bb003b628ce24688c5/pipevob.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/ec9fc47a9ad2d4c8bc6a1115b6c0132f/45260634282.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///202172582752804.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_off0001375a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1375A 18432 bytes
SHA-256: 797aa0dcd2a8be52a14deb602715a5f2865d28967f77c1e0147a8e2e304fb823
font_01_sfnt_off000167be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167BE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FD5 10336 bytes
SHA-256: 36a7f13dfc04cc25087c9fe1754c4c2bea6b81bf20bbd224ea36f949af62ed31

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