Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bee72cecc688412…

MALICIOUS

PDF

79.2 KB Created: 2021-05-08 18:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55c2e95542618912e9b924ff3acd2e02 SHA-1: 25516d36632070c3d92d275da5598af517a1b5d2 SHA-256: 8bee72cecc688412e6db27c44eca72557283ef1f3ca0381d273bf15167e4fd41
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160889b982d6a3---fivobukitujesagisatu.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c8f700fb1---40323797282.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160855768a22b2---34467126272.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e52b7bc8---95606354409.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1607191708354b---fukuxosogotimu.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/7a5a678e07343dd4c498794b823dd9c4/10498369096.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/phobor6ut3bu1rto5o5bl6dddq/rinanurugevexoz.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16089dc2234ffe---14096128709.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087103b36721---vupelaw.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/49ee0a3ddd78f9bdd27f7acc08d4b9df/51389821675.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f42fea714---58142054209.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/83bf7e616b5503f5ee9c70b030c5025d/xofogiwumozawinu.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/o621r5ub1ljq5adjp6b8l3f5da/katomojunenopevesil.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/24aea961ef3c848bb11accbae95593e8/milotuwizez.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/a7uou8hha39nhl3d0huslpv293/73472898929.pdf
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ecdcb9359---vixamasan.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be83e67e42---50838506361.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/jggsj31lvmllo8v4pjqlte6erc/vudojatabipigepizomej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=file+manager++karna+hai
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1da.bin
14f691b77d634e172d70b31c8d12afad399cfad0a931ce016a3a33ec5adeb4fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DA 3404 bytes
font_01_sfnt_off0000ddf4.bin
d143c778a6d32119903f5de44857a7181783d699e281140e25543f23603dc70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF4 4940 bytes
font_02_sfnt_off0000ee93.bin
790449ea8fa8cae3fc38b725326090c9a7e7bcd806c481d10af3eb6a6027d66c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 14844 bytes
font_03_sfnt_off000119aa.bin
d696f537672d26b3290a7eb7ef5b5b323cb5eb84a65d03f53bebcc3529cdcf51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119AA 16276 bytes

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