Malicious PDF — malware analysis report

Static analysis result for SHA-256 a22a1b2e97792dc8…

MALICIOUS

PDF

70.8 KB Created: 2021-05-30 05:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f446b0bd996e067f09f4b14294042419 SHA-1: d7129745ee7315d444e1d825eeb242c0a80e1836 SHA-256: a22a1b2e97792dc8cb6627e1e21159a792cf421ef2e0ea25416c52140a5a78f1
154 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to logging into Facebook, indicating a potential phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7593

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://acgroupenterprise.com/userfiles/file/32640078280.pdf
    • https://nanyangtextile.com/userfiles/file/31595024222.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/40271108cc2495c9bfd8399475309b3b/jololezusifavujajiva.pdf
    • http://nail-free.com/ckfinder/userfiles/files/xitebunituzuvosa.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/4cb6457981b9f9b0b78590834e401cc7/68752043490.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083b37dd74d7---sumelunezituruwitasamuxej.pdf
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607710c0e20dd---kuzaniwep.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f84acb394---23616948210.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/da0010fbcdefb0dd7204a2be9f8f450a/doroku.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/245dd49a027e29285ebff6b349361dda/11761306531.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848dff9771b---71551619805.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/b35598a4fef8f4008fa07db9ca944691/3293619403.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/1b637b7dd34ed9e42c4284f5ba35aa0f/93112984771.pdf
    • http://axwelindia.com/uploads/fudixagazesajolukoxupop.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/699db475e19deec2a77d7854c6c0edc8/tiwebeposiro.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2acdcef80---87385330818.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de4f18a25c---13708592793.pdf
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/b89bb2aeff977b10cb2cb2c01fae39b9/35851351420.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+login+facebook+with+profile+id
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da55.bin
4456b806e5013d9827905384f58ac50ab80fbab3a3d372e06fcb8e9217e93693		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 5496 bytes
font_01_sfnt_off0000ed14.bin
a7adc227453bc8419416ade392d59c823cb38e14a870c342761eea6b0d580a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 10908 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.