Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf1758f0d30ba10f…

MALICIOUS

PDF

82.9 KB Created: 2021-03-05 11:29:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 129582b3201674137268cd618c4b9a61 SHA-1: e705f7eebf5a3158a03b3d49d40d53b7d4d41fcb SHA-256: cf1758f0d30ba10f45184d1109093b86da60c2515b39981612a14a164f1d49bf
186 Risk Score

Malware Insights

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

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 6

  • 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 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://baarspo.ru/wix?keyword=novena+de+la+sangre+de+cristo PDF link annotation
    • https://lepamume.weebly.com/uploads/1/3/4/8/134882258/8072555.pdfIn PDF document text
    • https://cdn.sqhk.co/guzufaseba/zxjjRid/65380113680.pdfIn PDF document text
    • https://cdn.sqhk.co/logenuzupug/ig3gjWc/vivowofifurazone.pdfIn PDF document text
    • https://tajagarajoj.weebly.com/uploads/1/3/0/7/130776182/vemovab_binafagu_rugodolo.pdfIn PDF document text
    • https://kuzimedunadaweg.weebly.com/uploads/1/3/5/9/135993385/3551343.pdfIn PDF document text
    • https://cdn.sqhk.co/fomolunuvufa/iggdhhF/marvel_contest_of_champions.pdfIn PDF document text
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/jugaxozekab.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/hihhihi/jojigu.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/yDhaSjg/baleful_strix_scryfall.pdfIn PDF document text
    • https://cdn.sqhk.co/fekolisuzub/3kfijji/wexalevug.pdfIn PDF document text
    • http://mowewuwopirot.iblogger.org/69355017183.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/evhija7/la_liste_de_mes_envies_livre.pdfIn PDF document text
    • https://vajefusuvujob.weebly.com/uploads/1/3/4/4/134464162/1809239.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/bisapovepizaj/cargill_inc_annual_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/bach_etude_flute_imslp.pdfIn PDF document text
    • http://gonurorirezode.epizy.com/radosuzamuzefegatuj.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/kovedezofagopin.pdfIn PDF document text
    • http://rojegasofibi.epizy.com/47232692310.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/audit_risk_questions_and_answers_acca.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_off0001075a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075A 5136 bytes
SHA-256: 968e6aedca31de7f044b16f6f55974aa7ad676f95aaa44f571c440338f157d46
font_01_sfnt_off000118f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F0 11088 bytes
SHA-256: e42842562e8d0cf9d341e3088da03872c884594d96cc209bbd2af19e58ca1ae6

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