Malicious PDF — malware analysis report

Static analysis result for SHA-256 4731708dcdb21585…

MALICIOUS

PDF

63.4 KB Created: 2021-02-24 12:51:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9106afbc81d6187b52cdfb69f12dc287 SHA-1: db5c050805b11014e19e32142dd3dc31a6486c42 SHA-256: 4731708dcdb2158517d9bd1c3c85a78172e1c4a6f79adcdd1bdcf6bd26c96182
126 Risk Score

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://maypoin.ru/wix?keyword=amc+10+2020+solutions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4455907/normal_5feb4dc37f275.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/QvjdieJ/heart_gold_ring_for_girl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443578/normal_5fdf68a3e6c66.pdfIn PDF document text
    • https://cdn.sqhk.co/zisazege/gchcogf/amazon_echo_show_2nd_generation_manual.pdfIn PDF document text
    • http://zootime.store/66676822478x2hu2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_600a3e5420945.pdfIn PDF document text
    • http://summerita.fun/4214045653015c8.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/jeUibhf/lebofalujuriziwi.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/kYiggjy/yahtzee_with_buddies_dice_masters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405443/normal_5fdbc9cf0975b.pdfIn PDF document text
    • http://erogan-encolumbia.site/risizojoctrcz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kinugokapa.rf.gd/impulse_g_mini_manual_en_espaol.pdfIn PDF document text
    • http://lapamapifutul.epizy.com/lexonike.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/free_fill_in_the_blank_poetry_worksheets.pdfIn PDF document text
    • http://zamutodud.rf.gd/15412748353.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9C 4952 bytes
SHA-256: 279fabb9b745bf69fdb05127d768100a14d474ed2ec56452f236e2a30482d386
font_01_sfnt_off0000cd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD71 10440 bytes
SHA-256: 991963ef5e22d1efd2a7f195bb92c1f62a12da450371e2d2b4fc9ad301b0634a