Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5a7dbec6541774…

MALICIOUS

PDF

69.3 KB Created: 2021-06-09 00:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f35665892cca2a722906d1bab6785257 SHA-1: 99860792b9a4f2ceffa2f50e7f8e3dfe67331e8c SHA-256: 7e5a7dbec6541774c44b17b6781f67b3ef28fed357d38acd4f73dd9b17093850
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. The embedded URLs and the nature of the heuristics suggest the document is designed to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9693

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://smidgel.ru/uplcv?utm_term=sous+le+ciel+de+paris+partition+gratuite PDF link annotation
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075be93dfcc5---85882255856.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/82860160751.pdfIn PDF document text
    • https://ideylia.fr/uploads/file/78475446661.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b637c5bd823---44783843829.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6374c5270---befatikofijusemav.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607eef9699ee5---lamuwabesivekipazutaso.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/47fa4f12434766f76ecf723ae815e100/tadelul.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/kexesuj.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160828ac203ed6---vover.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/1fd48cj1situcbbmooogfvp2sr/9586884425.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2abbd6f98---zogawijudedumoxitugajexe.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/33d3c864e504611767fc6afaa6b718b3/45109270634.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/90fef0c50e53c8778245212b8496fc6f/32062742963.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1621753938.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_off0000e0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BF 5344 bytes
SHA-256: b4b28a89b1753cab1e7ac8d331bcf133cdfbe238c73c26f45b4739e16c937a9a
font_01_sfnt_off0000f2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 12240 bytes
SHA-256: c092ef41412f0e61bd1633b0bbcbc9ef7c54bd685badaa81b553148d27d06c53

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