Malicious PDF — malware analysis report

Static analysis result for SHA-256 75fe2c66971501ba…

MALICIOUS

PDF

70.3 KB Created: 2021-03-23 21:22:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b440d636b78c286cb89b4ac81d8a07ff SHA-1: c5da5dc4e896a8c7a20b77b876d2277db401e981 SHA-256: 75fe2c66971501bae1c87c31900fe51ffbe4da64325e20f19220bc78a6392ac3
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a suspicious domain ('mezovuduw.ru') that is likely used for phishing or to serve a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URIs and the PDF's structure suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=c+array+notes+pdf PDF link annotation
    • https://cdn.sqhk.co/girewobo/51hdhjg/word_blocksatz_einstellen_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375206/normal_5fd3cc5b2ad36.pdfIn PDF document text
    • https://cdn.sqhk.co/vajegipofuz/YgfxFgh/lucky_draw_tattoo_marietta.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/texas_boat_ed_test_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450512/normal_5ffd9c697fd7d.pdfIn PDF document text
    • http://vizozipemovowe.iblogger.org/la_plaza_del_diamante.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465386/normal_6045ee537b7b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_602f98a4edc38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383802/normal_5ff515c63f7e9.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/hgjfgjs/color_quest_ar_video.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/jiTIiGf/mutiziruluxusafajep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_600d43e14740c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471948/normal_5fdfbac88e182.pdfIn PDF document text
    • http://tikonazab.iblogger.org/bedsheet_manufacturer_in_chennai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403130/normal_5fdbed4bd0f4d.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://lorabedujeweb.epizy.com/rojabirogajegudusudiririz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2001280-1d65-4a0b-9050-274ce8d4a889/ccna_basics.pdfIn PDF document text
    • http://gevorewububew.epizy.com/insta_story_background_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7e8de07-2641-42fb-beba-7004e35df926/xadibop.pdfIn PDF document text
    • http://dutugege.epizy.com/libevumejenogoti.pdfIn PDF document text
    • http://bugelinuxobeva.epizy.com/karadixaduweximefel.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_off0000c8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8D8 4868 bytes
SHA-256: a1a1b73d28a964cd05fb61361e0f8186e8806821e396373d47b7c4929af2c7b5
font_01_sfnt_off0000d979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD979 10712 bytes
SHA-256: 66d8dafd5367b4bd1ba93011d25037584c6af9257714f107eba5a918af01ab87
font_02_sfnt_off0000fe2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE2C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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