Malicious PDF — malware analysis report

Static analysis result for SHA-256 c913d8aa965c0fce…

MALICIOUS

PDF

72.2 KB Created: 2021-03-28 15:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8bd078fdf2daa2d46e182acb4cddbafd SHA-1: 20546855bd8b911c8cf6e2a2cebc08812de41882 SHA-256: c913d8aa965c0fce97941923e31958bb34e0298aaff7569fc075d73031ea36f7
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 0.9990

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://crophysi.ru/wix?keyword=2016+toyota+tundra+service+manual PDF link annotation
    • https://cdn.sqhk.co/kobedobofepo/3lZhiii/31252414570.pdfIn PDF document text
    • http://nujagexurej.medianewsonline.com/27107054026.pdfIn PDF document text
    • https://cdn.sqhk.co/kusewupudin/ig4iehe/46011142645.pdfIn PDF document text
    • https://cdn.sqhk.co/zokuwagopole/ejbNlha/kanojikubumogepo.pdfIn PDF document text
    • https://cdn.sqhk.co/wegodimumod/PhdEhca/53659112058.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/gdmMy6u/16607569842.pdfIn PDF document text
    • http://lnstagramverifycentre.com/tiro_parabolico_ejercicios_resueltos_faciles09oec.pdfIn PDF document text
    • http://xteenware.online/spirit_blossom_thresh_costbvpk8.pdfIn PDF document text
    • http://martakkord.ru/ravamegeenwxc.pdfIn PDF document text
    • https://cdn.sqhk.co/nuditufu/ifzOgfM/11824177232.pdfIn PDF document text
    • https://cdn.sqhk.co/wowebajix/if7hbg1/20826154925.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/Vjfihja/47175163135.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/surah_yasin_arabic_to_bangla_translation.pdfIn PDF document text
    • http://xirapanagix.getenjoyment.net/major_depression_definition.pdfIn PDF document text
    • http://dabutaxezopis.iblogger.org/gidoru.pdfIn PDF document text
    • http://gosugas.getenjoyment.net/21787009010.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/jajahhR/bloons_td_6_hard_strategy_monkey_meadow.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/kgjhiM3/92521763281.pdfIn PDF document text
    • https://cdn.sqhk.co/dowufagit/Oecmif5/vujawutifafifivib.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwuzuwix/DKhfgfv/kemikatupegixexukak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rakojumetaxo.epizy.com/converter_from_to_word_file_with_edit.pdfIn PDF document text
    • http://nuxijezusuwep.rf.gd/knowledge_areas_in_project_management.pdfIn PDF document text
    • http://dexadusoxeb.atwebpages.com/27220843817.pdfIn PDF document text
    • http://wegupowir.rf.gd/dowan.pdfIn PDF document text
    • http://denufukis.epizy.com/nubakibilububas.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC91 5632 bytes
SHA-256: 1d29c3921ade0775bb6e776d00316dee235b64c3f72dd588591e74d30ebc1217
font_01_sfnt_off0000efb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 10296 bytes
SHA-256: 49473544bfc516b7b8bf6114762fd13a04f6bb3e6445d11bb9390b14103aae8b

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