Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9e32027d05e52c…

MALICIOUS

PDF

76.7 KB Created: 2021-06-10 07:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d179827cc9f28a27f028490310d0328d SHA-1: 1488c7e146eeb965d3fc4d0f9d8c524528968cdf SHA-256: 0e9e32027d05e52c102a3968fe3a099c264f0f19969c2a65ab265637f936f603
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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=research+methodology+paper+pdf
    • http://amphorabeautyclub.com/campannas/file/gagariliwuxufinuj.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/f328028c8381c0365d80dda1e7494d59/puwobebinokapewaxevenedu.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d139b72f3---38645231463.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b7e01ea795a68f99621f89c332698a94/45272219852.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d73c3e9f2---vezepetitajutojosaladuver.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/je9ofv49svimgv2ul2mg3vd2il/dezotezukonamomij.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba70160413---30174602106.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befe897184e---bibugawimivafoborufub.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa07377dbc6---77343088227.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bbe890493---vifelixiboxopodagodi.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078de0c86ed4---7670875078.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/3e95fb22d8d564d5e85669e5d06eb139/19037881206.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/71dc4fd40f1edb6c44c1ce98e187ff3c/36854355729.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/1526399435.pdf
    • http://karpatskiles.ru/store/files/4231443471.pdf
    • http://superplasticizer.cn/d/files/8431426705.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609607b48374a---jazizajuboduzunuzanefakoj.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/87ae7d7138024d6ee07e8568a9d6b8f9/6642319840.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_off0000efeb.bin
461f8b4e5dac8b354345540951e2fb951908d8c4bb1fb94411d066fda4e51e60
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 5680 bytes
font_01_sfnt_off00010322.bin
c3c4caab7010745a3add5314ba02c8095a56198895933b8943ce04ec634244e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 10200 bytes