Malicious PDF — malware analysis report

Static analysis result for SHA-256 e297b1219d042b06…

MALICIOUS

PDF

80.3 KB Created: 2021-02-12 22:32:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ba79d5391d8687c0e056c3b81cdf7f4c SHA-1: 92c7bf5f1d5c9521f1e8176e0eb885cf4777d002 SHA-256: e297b1219d042b066136d41e27c2ba452f8eadfd3162247c4050841b7a2394be
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to deliver a phishing or malware payload. The presence of external URIs and the overall structure point towards a phishing or malware distribution campaign.

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://jottigo.ru/123?utm_term=mafia+city+apk+mod+android+1 PDF link annotation
    • https://lefamadagizid.weebly.com/uploads/1/3/4/7/134704745/a028e.pdfIn PDF document text
    • http://belplitka.ru/credential_badge_templateftw19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ff0019f65069.pdfIn PDF document text
    • https://rurefisofe.weebly.com/uploads/1/3/5/3/135325463/1874950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_6013bc99091bf.pdfIn PDF document text
    • http://trokot-shtorki.online/baby_hazel_games_2017nmb9k.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fea042c47ebe.pdfIn PDF document text
    • https://wininivawad.weebly.com/uploads/1/3/1/4/131483201/wetesomuzofel.pdfIn PDF document text
    • http://easy-money-cash.space/nozutakadasanenesufopuzctc.pdfIn PDF document text
    • http://donbetosstreettacos.com/nugukijugosuzamoydupb.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/koduwa_vegemoj_lijusodadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nasutewu.epizy.com/varexijusuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/doraemon_movie_in_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/midevekapudo.pdfIn PDF document text
    • http://dibulazovila.rf.gd/84283611640.pdfIn PDF document text
    • http://luxixeg.epizy.com/different_email_templates_in_salesforce.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/environmental_risk_assessment_example.pdfIn PDF document text
    • http://pavasokunise.epizy.com/kreutzer_sonata_sheet_music.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_off0000f047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF047 2952 bytes
SHA-256: cb9072f881c1fe0ad8900bbcc5a20a23fabb306412f64e001cac76c2a9509f2c
font_01_sfnt_off0000fad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD6 5316 bytes
SHA-256: 110188178f012057a7c687d3e0139e101051377063920f9882851082a1d3dc01
font_02_sfnt_off00010cf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF4 10748 bytes
SHA-256: 2a0c2eb62756256e4c27cb88b8df45804e7f13ffaa01e61b3d7ccb5abc9c8a75

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