Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee8f1d928082026…

MALICIOUS

PDF

76.0 KB Created: 2021-03-12 06:55:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: a938d9fdf6f2d9aec05164cbae3482a5 SHA-1: 53b14a2d9b040eb8953a757cacae26ff46d241fe SHA-256: 1ee8f1d928082026beaa2eec27e49b03fc27dab2ffa2ad114098256ce745cb9c
126 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a link farm, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'ratchet shoes shop' and appears to be generated by wkhtmltopdf, which can be used to create malicious PDFs.

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://zajinet.ru/wix?keyword=ratchet+shoes+shop PDF link annotation
    • https://cdn.sqhk.co/wixexozesila/5T1Tme5/sagomapazufuxiragorofa.pdfIn PDF document text
    • https://cdn.sqhk.co/zixemoliz/jbiIWBH/jalifezorepadolewis.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/PbkSpjh/xuanpad_s3_mini_dash_cam_instructions.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
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_be48d894448c4340abfa127930b75c85.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f0e95b-e977-42b5-ba1b-ab4fa79e8140/pokemon_red_and_blue_strategy_guide_book.pdfIn PDF document text
    • http://vowurosato.rf.gd/26404386335.pdfIn PDF document text
    • https://7162f0c1-3bb2-4775-9ad2-1e34613fb889.filesusr.com/ugd/595093_f319a424f8d840ef99f2fdaf6092d19e.pdf?index=trueIn PDF document text
    • http://bajobakokela.epizy.com/simple_agenda_template.pdfIn PDF document text
    • http://xibunagevidaze.rf.gd/samsung_dw80f600uts_heavy_light_blinking.pdfIn PDF document text
    • http://nadefivetokilak.rf.gd/cse_citation_style_quick_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/67991652074.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_ce13de0ed1964b0199d409c9d693c970.pdf?index=trueIn PDF document text
    • http://detuzojezil.rf.gd/nijavidimalurasararemi.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/jebexisowuze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9907d99-7995-424e-96d0-c9f5ab1cf41a/devotion_paladin_5e_wikidot.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_7b4d57a3bc0340248ecde371f96cbf9b.pdf?index=trueIn PDF document text
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_6bfaa296b7724412ac8cab970fa87850.pdf?index=trueIn 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_off0000e06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06F 4532 bytes
SHA-256: 4bdf2f43dd04495a2fe0873984322470ad49e5fb88b8f0f3ebd74b0db58caee8
font_01_sfnt_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 10976 bytes
SHA-256: 8ff5a5fe86ec96767d43c58006cb3c8723ccaab0b2bcde39c24b25fc5259ab1f
font_02_sfnt_off00011561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11561 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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