Malicious PDF — malware analysis report

Static analysis result for SHA-256 45bfc3cd192838fb…

MALICIOUS

PDF

67.1 KB Created: 2021-07-18 06:24:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d27dc1fe9ebd4d147b0bc2a7684b1889 SHA-1: 3e6e43c7a4f17682b444fa5242bdd5d28fcf42e0 SHA-256: 45bfc3cd192838fb0b5df5fcfa1f8048fa5caaa08e5315ecdc408ed660cd2acd
154 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm with numerous URLs pointing to compromised WordPress sites, likely serving as a distribution point for malware or phishing content. The presence of these links suggests an attempt to trick users into downloading further malicious payloads or visiting deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7678

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://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/ea106391a293d662c786755908471b65/79579045051.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607709be5aa25---jatazu.pdf
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/al1ivoh9edugrrdk7cjep4v2t6/domafaduxelo.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/65b78f8ef47e291589aee3b6c9e10c19/27867727575.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bdabc1cca14---taloredubuzanaxefazavujak.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba73ffc5d05---75157570928.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef4931816---38791337645.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/51719224398.pdf
    • https://gymlesgeants.com/upload/editor/file/7664132358.pdf
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/045724108c54619d4143fd9abbe9d56c/61254058371.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608eeb4cb4e12---wukomasokokokes.pdf
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f200cd1c4b9---wubomenujelobi.pdf
    • http://haciogullari.com/depo/sayfaresim/file/95622890579.pdf
    • http://barudan.hk/UploadFile/file/20210606163609693.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/0jtd5qogucdrqh2ln142oef1um/47033610889.pdf
    • https://workinhotel.com/upload/fckfile/gusuxabegakosebinuwid.pdf
    • http://manleyboone.com/clients/3/3d/3dd19be848c73b0ce3a0430f7fd535f3/File/789543504.pdf
    • http://harasim.cz/uploaded/files/tuxolikizuti.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/aed7e2f750e9c5e10eed194da275d635/35547738969.pdf
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4931c2227---20082393385.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701b27a743a---zumenizejeronuno.pdf
    • http://hilimall.ae/uploads/files/75861804024.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=free+download+assistive+touch
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e564.bin
5891b0ee21097f0da3c73909f538bbcc8b803c0c9441a1e8ad03fbf2eb9c8308		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 17708 bytes

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