Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05f2ae92f022e4f…

MALICIOUS

PDF

66.5 KB Created: 2021-03-14 07:05:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ec573a7b637fae7f4dcd85a0f006215d SHA-1: 701e819ed05400b6529c113b1c9807dba526c06a SHA-256: c05f2ae92f022e4f5b7ddb1f2e2476665f3391076bed4d28bad44922210100bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=pioneer+avic+5000nex+installation+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385030/normal_60353a8457e8a.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/chc1gcK/mermaids_in_haiti_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikebepo/TgexFqa/download_game_live_or_die_zombie_survival_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/kajutizikodu/hf3hdbP/xejatebomajenu.pdfIn PDF document text
    • http://lg-supportteam.com/blue_clean_power_washer_383ssoist9.pdfIn PDF document text
    • https://vuvopovakufusoz.weebly.com/uploads/1/3/4/3/134342968/vukar-wulusefuxidupo-gekobakuvexu-dumuvanoze.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/moca_certification_test_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466413/normal_6011ed1b70d03.pdfIn PDF document text
    • https://xaforegitada.weebly.com/uploads/1/3/1/4/131413040/jidubimixerawasiwetu.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/z2gdicR/weird_west_game_wiki.pdfIn PDF document text
    • http://housefashion.ru/xigoxq52s0.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/29655675187.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/luvabapopikak.pdfIn PDF document text
    • http://rufoferapavinew.medianewsonline.com/poesie_francaise.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/kevava/wopowalujatebalebikuw.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/bbby_stock_earnings_report.pdfIn PDF document text
    • http://pevogikuxupeja.onlinewebshop.net/34833547688.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_off0000c81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81D 5340 bytes
SHA-256: be9ca161d4163c523d04d170b25502b7e990a5eb46b230bfea443bf23f16a11c
font_01_sfnt_off0000da39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA39 10232 bytes
SHA-256: 7a7e403810d858a24d21e2a77f538fc370c662cf2a8d246b3beeb1362e3d5274

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