Malicious PDF — malware analysis report

Static analysis result for SHA-256 002bd95d70814004…

MALICIOUS

PDF

75.8 KB Created: 2021-06-08 05:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: afa9851ba8e1c3af5cff141c4139e3c2 SHA-1: 5356f641689352cf47cd714d7a80f0e9a4afed57 SHA-256: 002bd95d7081400460d643026ee649a2e27682a9f8a6bcaab570db5b148ae255
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to construction turnover letters, aiming to trick users into clicking the embedded links.

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://queure.ru/uplcv?utm_term=sample+of+turnover+letter+for+construction
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf87320382---42615881831.pdf
    • http://anandamsanyal.com/userfiles/file/vaxidukeniwo.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/ftdl8e8brj5epas349f5e0pvi1/58710952936.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/a9b4fe6980bb02ceed3d024202b3f79b/22018748731.pdf
    • http://zulassungsservice4you.de/bilder/file/tebusefopifobipejali.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/1fa1c6fd46f6b6372cac01b7a202a45b/37349004134.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074a9758cf4b---sorukiboxusonekiwe.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/a41a293e928102f6ddb86c31a73bdb61/18124869477.pdf
    • http://koryosushi.com/uploads/files/jagidobus.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9d2888374---44999403903.pdf
    • http://investin-khj.ir/ckfinder/userfiles/files/15891191544.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd18aca5a8---49329662442.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/b192236ee0a2786b69249938103e36b6/wulosedew.pdf
    • http://synerfreight.com/syner_upload/images/files/14648645123.pdf
    • https://rybczewice.pl/userfiles/file/71673709351.pdf
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f850a3a782---pofeduluzodofunem.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/6bde9792e418dac6b5a98e90ff731006/fitulesudajojovuwizadu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000ee3d.bin
e4988214c010ab2bf85bb8afbfc45e9c2d47011177149ceacab958204ce99900		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3D 5324 bytes
font_01_sfnt_off0001004a.bin
4cd00222b8200278bb4f9d2ee701111e7d844e7bc75f5985d948dab74c962f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 9764 bytes

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