Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0741f8172b0815d…

MALICIOUS

PDF

94.7 KB Created: 2021-06-15 12:56:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a90cd6c327ffe1cf2252802f1057b60 SHA-1: 0fd38bbc64195cd3250127d099f8cb60e208032d SHA-256: c0741f8172b0815db7c0836451c491abe63eb04da0da9a34b843fba0178422f0
156 Risk Score

Malware Insights

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

The PDF contains multiple links to compromised WordPress sites and disposable hosting, disguised as search results for game cheats. This pattern suggests a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

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://nomylo.ru/uplcv?utm_term=turn+cheats+on+sims+4+ps4
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a847c4f8d---83381086136.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094124d7dc95---rolezij.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/gt235jo0kos03d5a5idu38mq62/52718156871.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160876ac8236e6---kudovewukilemanilo.pdf
    • https://hogies.com/includes/template/uploads/file/sufiko.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/7e53eb63481cb1f32d911d98c40df94f/7771762413.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea40a921ea---57054419582.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/95bf4db8e0110661942c0ef0affe958b/42030686487.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bf79395f11a---zopitiforaxim.pdf
    • http://tanriovermensucat.com/uploads/genel/files/59614688859.pdf
    • http://ankamet.com/userfiles/file/tekibanomosujididetakate.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/e0c43faedce3c5c8e4b05f7ff812abc9/fopujur.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/86daf50f7rkhgs34hj2d7rc3p6/xabemitanonoz.pdf
    • http://fkhd.cz/data/img/40711873212.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/n2fhm58id3midv7tovncrso336/13993358561.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/308a8a5419f80052a3ff8e3eccb22e51/49724049572.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f3a4b286c---3960279895.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_off000134a5.bin
29b4a5091310e7201cdea920f36daa0de2ef7561028020f204e81bcf5014d624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x134A5 5180 bytes
font_01_sfnt_off00014619.bin
3bb10be0432ffc37a02f588c9e79d907434faa346698cba532f230c494640c4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14619 11796 bytes

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