PDF malware analysis — malicious · c0295a501b88d1a3

MALICIOUS

PDF

38.9 KB Created: 2021-09-13 08:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 3646f20465bc411379424a81d9f65221 SHA-1: 8fce86526bc5c349497b0f78081e30421fadb377 SHA-256: c0295a501b88d1a3829b4d31277d31ed32742dffd5ca03eb8eaebaa85b594c58

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with a click-outward action, typical for phishing. The document body is heavily obfuscated, but the presence of numerous external URIs, many pointing to PDF files on various domains, suggests a link farm or redirection mechanism. No scripts were extracted, but the overall structure and heuristics point to a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.8579

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
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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 http://hykylalumni.org/userfiles/jezijemero.pdf In PDF document text
- http://starma.pl/files/file/lelenufifajuwakonuninow.pdfIn PDF document text
- https://northwestconvention.cz/data/files/tewatefesimekanupanumo.pdfIn PDF document text
- https://skopjemuzikon.pmgrecordings.com/ckfinder/userfiles/files/73874019274.pdfIn PDF document text
- https://thaiahpa.com/flash/files/72642000990.pdfIn PDF document text
- http://masan315.net/board/imagefile/file/toriw.pdfIn PDF document text
- https://commonwealthsportsawards.com/userfiles/file/86994926114.pdfIn PDF document text
- http://e-menu.hu/editor_up/gelijolibibefegivali.pdfIn PDF document text
- http://textstricker.de/benutzerdateien/45886848025.pdfIn PDF document text
- http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131206a97f61---25923268184.pdfIn PDF document text
- http://texinpack.com/uploadfile/file///2021091004052784.pdfIn PDF document text
- http://compufoxmail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/34130662687.pdfIn PDF document text
- https://vadihosting.com/calisma2/files/uploads/tawapuxejovi.pdfIn PDF document text
- http://captaincook.hu/userfiles/file/vilolime.pdfIn PDF document text
- https://topupdana.com/contents/files/negukabewog.pdfIn PDF document text
- https://www.tristar-technology.com/ckfinder/userfiles/files/zifezenageponixubowuw.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=speed+up+android+11PDF link annotation

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