Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd4f2ec5e88e1686…

MALICIOUS

PDF

148.4 KB Created: 2021-07-20 05:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: e218a9fccb07367269915e2b03b0e8e1 SHA-1: 86cfb0b9ebd51d90f18f980806f875e18d487ffb SHA-256: fd4f2ec5e88e168610bb7638464613f2308ddabc67eaa8cce2d6c97704cca0c9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further indicate malicious intent, likely to deliver a secondary payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6407

Heuristics 6

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://nhuaduongnhapkhauaz.info/upload/files/20436127568.pdf In PDF document text
    • http://vanillasky-ch.com/images/files/16598370179.pdfIn PDF document text
    • https://chptravel.ir/data/file/xedibetukewikaneluwivon.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a98cd3bb5c---fudubexovifugul.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/76693096111.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/19a666b8c8993b8c7fbe32a164a8197c/9916276811.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/dvb7ctnejtmn2lm7ct8k18n4c0/fotavakor.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/mimumudokapanoxepob.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/ddb738322f83a718fc0bcde67e0dbe40/jofawisepilakijedixebewuk.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/t9tu4a1ni5ksh57pgra369ndv0/balosifo.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/nomedo.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/61cc3ea11db30135fdcfe7e0074fa417/8297016768.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160acd2a2aabb9---8347804832.pdfIn PDF document text
    • https://highrise.pl/file/1210078778.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607231ea98c95---duvixig.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/vmppfdrkbtrfj3d11ti5cf0ps4/69466320594.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609861f7e18ba---senapojaxewesexunafa.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/geweranogedejalifuxaga.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/8rlor16qi4mui3novar14n8k9i/65922524643.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/5078121047.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e8dd61ca6---navefa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=i+am+a+7+letter+english+word+childrens+like+me+more+than+milk+malayalamPDF link annotation

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