Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edc723196f5e27a…

MALICIOUS

PDF

92.3 KB Created: 2021-05-13 08:16:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 684a7e7cc6d750c606dba17570864a30 SHA-1: bb5e66e01b24352c0a3f144a483e604a32a29ee5 SHA-256: 6edc723196f5e27a14554ec020f049943f253520f365f07924376b01098cc1d1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to redirect users to harmful content.

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://kuzutuzo.ru/strik?utm_term=is+multiple+intelligences+a+valid+theory PDF link annotation
    • http://card2card.live/digdeep_image_recovery_apk_prow2dgs.pdfIn PDF document text
    • https://cdn.sqhk.co/ranamifujuki/vjcN3jf/rujarixukejukuvujofo.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/jhgdihQ/pozuvosiloridapefi.pdfIn PDF document text
    • http://lightly.store/vesoserinadujalovawpf11j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5ff0a82ed0332.pdfIn PDF document text
    • https://cdn.sqhk.co/vagizabibo/hhdigg3/91130969307.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444864/normal_5feb6b90ef993.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446401/normal_5feba1547bccf.pdfIn PDF document text
    • https://zudezujom.weebly.com/uploads/1/3/1/3/131384555/tewuladeka.pdfIn PDF document text
    • https://cdn.sqhk.co/tuledapozato/bieihCq/sebowanavumedodisak.pdfIn PDF document text
    • http://jakartapro.xyz/simpson_professional_pressure_washer_3300_psi_manualsdbvo.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/sutepudu.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/anime_characters_birthdays_in_march_12.pdfIn PDF document text
    • https://dulumomotuvubu.weebly.com/uploads/1/3/4/7/134759228/jakejo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5ff578fbc5828.pdfIn PDF document text
    • http://healingtunes.ru/zavomomigabudevexasanarusbi98y.pdfIn PDF document text
    • http://okstore.info/damufililidargr65z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://japamitafixe.myartsonline.com/tenagujikugigupe.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/fear_and_loathing_in_las_vegas_book_sparknotes.pdfIn PDF document text
    • https://s3.amazonaws.com/subopukomanaw/freestyle_rap_instrumental_beat.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_off00011e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E25 5468 bytes
SHA-256: e8e5cbf9edc600bdc5811f844b14e07fbcc4bfdfb10c4a862dd5bc873420e148
font_01_sfnt_off0001308f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1308F 11140 bytes
SHA-256: b32535e3d8478d9bb7e659293082de4b0e7dfcf8c556de02ec3d6f7423c3f5b8
font_02_sfnt_off000155bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155BD 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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