Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9640063c580b274…

MALICIOUS

PDF

83.3 KB Created: 2021-05-06 17:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e8898f97d3a91b6eb720b04c2c751cbf SHA-1: 2a2a3f30f797bebc84e254cd84de4888cd398301 SHA-256: a9640063c580b274ff32a21ac8dd9c4be3c5124a4c416ec50ab3dac7cb3c99ab
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one prominent URL pointing to 'lozipotod.ru', suggesting it functions as a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to redirect users to various disposable hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=the+condition+of+the+working+class+in+england+by+friedrich+engels+%25281845%2529 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379048/normal_600dd1802e2f8.pdfIn PDF document text
    • https://xuzizalebu.weebly.com/uploads/1/3/4/7/134772475/defopolewobusow-kogit-zesefewef-fatufebitonixi.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/hjcjeTi/torowomad.pdfIn PDF document text
    • https://kunejadisitezan.weebly.com/uploads/1/3/4/0/134096254/4345445.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373987/normal_5ffc51a13683d.pdfIn PDF document text
    • http://sarotofo.iblogger.org/51926693504.pdfIn PDF document text
    • https://cdn.sqhk.co/levuzivanu/ebheDih/solution_open_puzzle_box_level_50.pdfIn PDF document text
    • http://fipirovivupaf.22web.org/uniden_trunktracker_iv_software.pdfIn PDF document text
    • https://keguvetazako.weebly.com/uploads/1/3/4/7/134702613/wedoninojasibi-buwutipedil.pdfIn PDF document text
    • https://rafopovuweke.weebly.com/uploads/1/3/2/7/132740485/3089558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452372/normal_6041a473e00a8.pdfIn PDF document text
    • http://nezerowiba.iblogger.org/1694652572.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454822/normal_5feb976ae5b8e.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/VbIqkia/syfy_harry_potter_weekend_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/89646403119.pdfIn PDF document text
    • http://gipapexof.rf.gd/golosatimonixowigezeme.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/temiboraz.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/minoxidil_beard_transformation.pdfIn PDF document text
    • http://jilevatawew.epizy.com/motorola_moto_g_2nd_gen_review.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/admirvel_chip_novo_album.pdfIn PDF document text
    • http://kuporalegumema.epizy.com/83649642522.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F8 6240 bytes
SHA-256: 4bf68ae0b57a8f8919d796b2643025e99762fb94006a4b5cb3d6cbd07720d577
font_01_sfnt_off00011d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D61 10100 bytes
SHA-256: 1898888a49699d4b1ffca0ce7ba2ee2d1511183803a5df212cd039ebf46633ab

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