Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8e26a25a222d42…

MALICIOUS

PDF

70.3 KB Created: 2021-05-15 20:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de60cfc3a5f504468c4e96c8ec001590 SHA-1: 2186fa1ec96ff5167c67cc564d34f761f46e7356 SHA-256: 0e8e26a25a222d42bc1f525f8acab914bc0833d294df7299c401e201172ad658
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised WordPress sites, specifically within form upload directories, suggesting an attempt to host and distribute further malicious content. The presence of these links indicates a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980e5f348c3---buvapepavurijozowu.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ccbjjro104g57r2lg9obi6rpal/31288788276.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608353d215e5a---15828245352.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/a2ojqmsr6976ner5998r962od5/32230423763.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9d2d0680---29926796711.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d01b5a6368---labudubi.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16079bd39b659c---ravonimisini.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c726392913---nawizowitekanuvomasa.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/35d3d3a8b7675434307aff802053cde3/gupebelafeb.pdf
    • https://etonbio.com/newsLetters/images/file/feredin.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d03b32d4c4---mivufu.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/c32bd346107d27a05d2acb688a970c17/duviwidafiji.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3a0445d94---wixuziwofukus.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4cd22682d---25389830751.pdf
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/894106e287acd4d3c13beddf50811b58/nunukarebogebalotamej.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5599a1ad3---fonulekaga.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=chattel+band+music
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d793.bin
376d34a57bb3a46b7fc2a45f9b39854e3e5602ddf2f1028096e2a6c9eee998e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD793 5128 bytes
font_01_sfnt_off0000e8d1.bin
7e9d62db5a7ef78ea3ada9e4c483af86878ca8a2bf116cdbe3278047546fe8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D1 10520 bytes

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