Malicious PDF — malware analysis report

Static analysis result for SHA-256 050ff64beb2596c6…

MALICIOUS

PDF

74.7 KB Created: 2021-04-05 08:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9b8c81d54debc0661cd633242af78a82 SHA-1: 731f37f26c6724c3cc3f8c22f611e3283bea6f2a SHA-256: 050ff64beb2596c6d3878b048f69e4ec11d0ae1118cdeb410ecb4b846548f323
126 Risk Score

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 0.9997

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://mezovuduw.ru/wix?keyword=sas+zombie+assault+3+unblocked PDF link annotation
    • http://martakkord.ru/how_to_audition_for_a_moviemcgi3.pdfIn PDF document text
    • http://24goodstore.site/zupevufopigabuxunafeflis5b.pdfIn PDF document text
    • https://zediruli.weebly.com/uploads/1/3/4/7/134725524/7770911.pdfIn PDF document text
    • http://wejutejejuwow.iblogger.org/gudegumumafujerumareropo.pdfIn PDF document text
    • http://nitofotinelip.iblogger.org/autodesk_revit_architecture_2011_tutorial.pdfIn PDF document text
    • https://kevafesituwa.weebly.com/uploads/1/3/4/0/134040773/xubotofofesexegur.pdfIn PDF document text
    • https://xesilowavexaweg.weebly.com/uploads/1/3/4/2/134265648/a780118e.pdfIn PDF document text
    • http://jalatuxu.iblogger.org/82890668724.pdfIn PDF document text
    • http://fc-aromat.ru/jinoxavaberazajeguvexacnktz.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/mukutud/42127470666.pdfIn PDF document text
    • http://vopepogam.rf.gd/36643160937.pdfIn PDF document text
    • http://zusupulek.rf.gd/16076955907.pdfIn PDF document text
    • http://defixasu.rf.gd/how_many_years_ago_was_the_first_agricultural_revolution.pdfIn PDF document text
    • http://bajivuselome.epizy.com/78789218407.pdfIn PDF document text
    • http://dobemeze.rf.gd/98402944692.pdfIn PDF document text
    • http://kinefinukabel.epizy.com/bibelen_p_dansk.pdfIn PDF document text
    • http://dilutevanu.epizy.com/applied_research_methods.pdfIn PDF document text
    • http://medemamonolusav.rf.gd/zaresosuxonabej.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/10352897130.pdfIn PDF document text
    • http://fexodifajeb.epizy.com/sermones_bautistas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD3 2960 bytes
SHA-256: 4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac
font_01_sfnt_off0000e643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE643 5512 bytes
SHA-256: 99c7b3cd7885cbf34ee9db11b10328fa7f32164c189d6192fd67f0d10b386808
font_02_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 10812 bytes
SHA-256: 578c8e033f876e9d779d04dbf940691a1933b0942f097e63866e76515a6050c6