Malicious PDF — malware analysis report

Static analysis result for SHA-256 4429261f591b1953…

MALICIOUS

PDF

47.0 KB Created: 2021-10-04 09:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 38efd96ab0d47a69818720a9dbd5217b SHA-1: 7efcd5e9c34b2c3ac7173f62d0df6ca368bd0fe8 SHA-256: 4429261f591b195396612468daf9447441c13b33e69e436308fc1eedd2c47bb4
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to websites that appear to be part of a link farm. Several of these URLs are hosted on compromised CMS platforms, indicating a potential phishing or malware distribution scheme. The ClamAV detection and ML classifier further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7740

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 http://facilitymanagementassociates.com/survey/userfiles/files/mufurovefofosamosedemogi.pdf In PDF document text
    • http://as-eng.biz/userfiles/file/39178859916.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/17978848706.pdfIn PDF document text
    • http://flyingfish-stay.com/userfiles/file/fasiladez.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/94793162349.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/44229498168.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5adf25e51---jiluzogow.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/81214171624.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135fbec66121---85997558809.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/34121763388.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/72099278564.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/bomom.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/tebidikatojusifasaf.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e83991e34---46317395987.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/duguzoxalamadapuviko.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/sajogivamin.pdfIn PDF document text
    • http://edeins.com/userfiles/file/dimobiduzetitojop.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/88377310644.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/37400011239.pdfIn PDF document text
    • https://marosme.ro/hirek/file/82457630877.pdfIn PDF document text
    • https://alves.bg/ckfinder/userfiles/files/69001867735.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=legal+aptitude+questions+and+answers+for+kleePDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/fusavesovofowe.pdfIn PDF document text

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