Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca4677e527a1fcc…

MALICIOUS

PDF

76.4 KB Created: 2021-03-15 16:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 334f92173aed08d1ba530d05a7722eea SHA-1: b7aa06c6279c3fe39ced608c43ac8d4c5337fc3a SHA-256: 7ca4677e527a1fcc9ed0f70ea5d09ae93eff5bc2467508f0252064277a510159
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. The document contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to deliver a phishing or malware payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/aws?utm_term=boneco+air-o-swiss+demineralization+cartridge+refill PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365591/normal_6041c0fcc4ec5.pdfIn PDF document text
    • https://jakineporop.weebly.com/uploads/1/3/5/3/135302356/daa04.pdfIn PDF document text
    • http://jirusulixozome.scienceontheweb.net/gosapa.pdfIn PDF document text
    • http://maloxibosuveviz.iblogger.org/61144652703.pdfIn PDF document text
    • https://kukixagunobi.weebly.com/uploads/1/3/5/3/135325453/pujuvis.pdfIn PDF document text
    • https://vafukited.weebly.com/uploads/1/3/4/0/134017527/069f11f5c.pdfIn PDF document text
    • http://falorilipeb.mywebcommunity.org/49409261137.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/Jum0jdb/15174895895.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/which_is_not_a_conflict_resolution_skills.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_5fe91e3c0b9bf.pdfIn PDF document text
    • https://tamilavijunaw.weebly.com/uploads/1/3/4/5/134506647/gejeduxaxudu_pamem_tonusujibedu_dudebako.pdfIn PDF document text
    • https://cdn.sqhk.co/vukixukafoga/AgiWlOz/magic_poser_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_600ecb6217f3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372696/normal_5fedf70194f49.pdfIn PDF document text
    • https://sobiwololisa.weebly.com/uploads/1/3/0/9/130969717/173060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481170/normal_5ffe416b8fae9.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://wamivofubamaxit.epizy.com/language_style_sheet_linguistic_society_of_america.pdfIn PDF document text
    • http://fabodatutowew.epizy.com/16284903152.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_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 5352 bytes
SHA-256: 9b0f55253ef8be4cc06a531bd0a8f0a301b89f0310f2a3a3ddf93a82c10ed5f9
font_01_sfnt_off0000f07a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07A 11036 bytes
SHA-256: 9a878d410356c77f6afdcaf83a3ecd40458b823e9e0d269dfdb84bfe4637a05b
font_02_sfnt_off000115ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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