Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcde92e9ea5c68c…

MALICIOUS

PDF

59.7 KB Created: 2021-06-19 05:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3545406b90c29bfe65e448e64c370902 SHA-1: 4a65fd05c3df4fa0e7293951b6289c3304740b5a SHA-256: 2bcde92e9ea5c68c5a4c33581ed288abecc821f7efb27016f394f448ab17e744
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary attack pattern involves luring users through these links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7798

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=wow+classic+raid+resets PDF link annotation
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8452bbfdf1cf3420beec68d3ba609463/zapusewobawom.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/c1918a0691563c6e14b2e8c6b3899c63/kewevosefeforiniwefokavuw.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a49926a248a---92855096441.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/12646103201.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/10215132120.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7b0326e96---dubemalisomuzog.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeeffa1a98---86972156272.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/matoserod.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97f9e0c71b---52027719967.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/s8prgf9oq98fojaj8es43fp7v2/92829807879.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/zuwajosi.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608543ac038ae---sufibixuxajidup.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/93320739735.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16084b0e243523---narilutezotitanagavowef.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/jitoxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E3 4720 bytes
SHA-256: 9aa6e2c10a5470eb795550ac26a7b698f0dc11ab4fb23684b461b36bb06d4fdd
font_01_sfnt_off0000ca0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0A 10676 bytes
SHA-256: 72bebfdd1e5a93a8829d6e5e349d4879ecf07e0ba0e38a2e1d9af77c004f5eed

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