Malicious PDF — malware analysis report

Static analysis result for SHA-256 607234e37ea23931…

MALICIOUS

PDF

66.2 KB Created: 2021-05-11 01:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0aa979755b1b746a437c71af233a39e7 SHA-1: 0f34af361c0df68c2ac36a3d7f67cb5c8a5d909c SHA-256: 607234e37ea239310127a3da79f117d32cad739a7572cbdce526ef5ff80af505
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as containing a link farm pointing to compromised WordPress upload directories. The ML classifier and ClamAV also identified it as malicious. While no scripts were extracted, the presence of numerous links to potentially malicious content suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8612

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075b5d1ebb88---gabatado.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/208e53eaa0f0e817f90de0cb45f6a0c5/31172513152.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16096afbe4508f---fekoxurejule.pdf
    • http://aisef.org/uploads/userfiles/file/file/dejobisedinenevisaf.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/o74v8kq463plnjq88lj9ee4ka1/89989406130.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f655bb89e3---41482459360.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/75kafb40a20hd01sh3ll5lf0p3/worugifoxu.pdf
    • http://architects-desk.com/uploadsfile/bamifo.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/0958cc22b3a1dc2101e1241b2d54c4a7/5568456878.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/cb00d5edd98e2de6f55a1f858b6bdb4e/fedoxivopi.pdf
    • https://ludifrance.fr/userfiles/file/6725766111.pdf
    • http://monkey-do.net/userfiles/file/62205095340.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec1242a39---79704950368.pdf
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/8b418c6a8ba30c76e4397f663bf5d5d9/pixusigazixexesub.pdf
    • https://atcotourismtravel.com/userfiles/file/tazesafumagiloripubewu.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/c7juqg9tep1622a31smnn7di07/70225173249.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160701cfb0ce8d---nogiliki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=abaxis+piccolo+manual
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d896.bin
49ec7ec07f097c62fe38711675e0e7f890752e9f97ac6e20f16878723c9f9edd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD896 5180 bytes
font_01_sfnt_off0000ea29.bin
24d7972a35bd1d712e47d3c943ba597a14422e9156c05f63085e934f156a9984		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA29 10044 bytes

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