Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce19a7945cd921c4…

MALICIOUS

PDF

76.3 KB Created: 2021-03-30 17:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 5fe4c4bb25ee17ad3c495a6cfc3574c5 SHA-1: b102862ea2a76c4970f9bde7dc4bee51da864657 SHA-256: ce19a7945cd921c4fbe2ec7b7c30a3597bcea8e8e676e52bb7d205b94fc1354d
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine results or redirect users to phishing or malware sites. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=tiny+ftp+server+apk PDF link annotation
    • https://cdn.sqhk.co/goluxewimabu/ggVhc5F/rapovarifomikakig.pdfIn PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/ad3b789dfa.pdfIn PDF document text
    • https://zejosawazir.weebly.com/uploads/1/3/1/8/131856185/9618331.pdfIn PDF document text
    • https://cdn.sqhk.co/ditetona/KuMrig2/40486601596.pdfIn PDF document text
    • https://retelajipubo.weebly.com/uploads/1/3/4/7/134700068/ponaxulofuxel.pdfIn PDF document text
    • https://cdn.sqhk.co/xororofomed/hgY1lgf/91624991843.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/525381.pdfIn PDF document text
    • https://cdn.sqhk.co/gepabafi/jiidF43/guilty_gear_xrd_sign.pdfIn PDF document text
    • https://cdn.sqhk.co/mesafovojifo/CdiaAhg/www_starfall_games_com_dress_up.pdfIn PDF document text
    • https://rugovisatef.weebly.com/uploads/1/3/2/6/132682701/jugodovixexek_wuxutam.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/jhibGmF/16491166385.pdfIn PDF document text
    • https://poxomovuru.weebly.com/uploads/1/3/1/3/131381772/162dd.pdfIn PDF document text
    • https://cdn.sqhk.co/wupofolizaj/hjOvajj/eq_music_player_pro_apk_mod.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/mikexenatu.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/igfgjaW/miloponotikuwuvoz.pdfIn PDF document text
    • https://potepivogatofef.weebly.com/uploads/1/3/2/7/132740463/ruwajejuzejizada.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/xopugup/60506227387.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/17_june_2019_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/26119708907.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/42601535484.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/13901729183.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/captain_america_workout.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_off0000ee87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE87 5040 bytes
SHA-256: 793c0dc3eac15b221f6f8ffb513282f612c6136803cd4ed6d748612520a8ee66
font_01_sfnt_off0000ffd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD0 10564 bytes
SHA-256: 07d1fe87e732fd0604318cdadf74896a0481d39ede5b9a5e4665634d60afc77c

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