PDF malware analysis — malicious · 093889c31a7f3410

MALICIOUS

PDF

54.4 KB Created: 2021-09-01 23:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: a2e41156466debc9a41bf887da3c83c3 SHA-1: b2a9bb0eeba1086b1fe32ca3207418d36fcd81d5 SHA-256: 093889c31a7f341082f37600a14357705b11205a69af4748b48bdc7afdb2d80f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to multiple external URLs, many of which are hosted on compromised CMS upload storage. This suggests the document is designed to lure users to malicious sites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.8283

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 https://garglob.ru/uplcv?utm_term=how+long+does+it+take+to+write+500+words PDF link annotation
- http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911d58bb26f---posazazidimojipojerenaf.pdfIn PDF document text
- https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/e31cac0e8c8c9f3c3557e7e59b8d2e3b/79022313332.pdfIn PDF document text
- https://pbchistoryonline.org/uploads/file/sifanadoxakefoleranaziv.pdfIn PDF document text
- http://thietbiotovn.com/Images_upload/files/29141067594.pdfIn PDF document text
- http://dnepropress.net/files/file/xafuxixigusole.pdfIn PDF document text
- https://gilbertems.com/videos/file/xomobekovukasejorod.pdfIn PDF document text
- https://genegurumiraclehealer.com/userfiles/file/kudufo.pdfIn PDF document text
- https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/e55b96f7e67be89639174c8319699043/46112028784.pdfIn PDF document text
- http://ajisushionline.com/uploads/files/vozetakadizimip.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/d06825d7f91fc07643bbd84a954f9d5a/17680010241.pdfIn PDF document text
- http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/1967729493.pdfIn PDF document text
- https://mayxaydungthienlong.com/uploads/files/files/72253291103.pdfIn PDF document text

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