Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b96c762d458168…

MALICIOUS

PDF

86.0 KB Created: 2021-03-07 13:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 68d1dd7ea58134e7a1a97aac1d110992 SHA-1: af80ace74ada055e3f56e7f21f1689e6495898c8 SHA-256: 95b96c762d458168eebcaddac70eaf90ff82184a8a3a8ca8385a637a00ab0949
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, characteristic of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites, potentially exploiting PDF vulnerabilities or serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=kia+sorento+workshop+manual+free+download PDF link annotation
    • http://vaxiliwu.medianewsonline.com/73523236757.pdfIn PDF document text
    • http://instahelpforbusiness.com/nonton_the_chaser_full_movie_sub_indoehote.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/hinahj9/dino_hunter_deadly_shores_pc_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486523/normal_603e8a6ba2042.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxijavapul/d2jbAgK/jafer.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/31259299862.pdfIn PDF document text
    • https://cdn.sqhk.co/lexaxemiji/gdigija/black_men_braid_hairstyles.pdfIn PDF document text
    • https://cdn.sqhk.co/kafekata/SaUN7EC/slot_cars_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/vepanoxubere/gijhico/chess_rules_in_gujarati.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/iPkqIDc/64513638913.pdfIn PDF document text
    • http://daravto18.ru/the_fact_of_blackness_quotesloc31.pdfIn PDF document text
    • https://cdn.sqhk.co/givogaduta/jgccFhg/2_player_card_games_to_play_at_home.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404528/normal_5fcf59dfb35e2.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://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_0603e222cd6e4e3fbdbf738c4255722a.pdf?index=trueIn PDF document text
    • https://b40f07b9-a98f-42b6-a6e2-5dc2c82ebb0e.filesusr.com/ugd/e949ea_f8636798048b444da9b187fddfc89654.pdf?index=trueIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_fbaf06188b8b46bea97e15347b7d4181.pdf?index=trueIn PDF document text
    • http://gevejonitu.onlinewebshop.net/special_education_in_contemporary_society_7th_edition.pdfIn PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_92368de1bf074c9b8e1b9c9c54a36952.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_off0000fcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAF 5288 bytes
SHA-256: 912aa84cd53ad46c4718aadfc7366c3f83ecef161d30185d801a3f9f5ca1e15b
font_01_sfnt_off00010e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8E 14744 bytes
SHA-256: 4d440cbdb7fe6483e973b5b1457c930576d36813d83cb6208af9539d644e081d
font_02_sfnt_off00013cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176