Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d157b932551a254…

MALICIOUS

PDF

73.3 KB Created: 2021-02-25 09:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a7e66bf91790b6a8514eeba83f2610e0 SHA-1: 17a84de3498bf0b88019c065153e27b2377219e8 SHA-256: 3d157b932551a25429badbf66404c80d767fcf60451548bc689ffa020edab0f8
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=who+is+eligible+for+food+stamps+during+the+pandemic In PDF document text
    • https://daworotiboxega.weebly.com/uploads/1/3/0/7/130775949/xalorege.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/gHfjfjL/9208890726.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/mowinobewojatowu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530578/normal_5fcf34c92ac0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382973/normal_5fe2ca5601dae.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/aiajfyq/remesufaruluzo.pdfIn PDF document text
    • https://cdn.sqhk.co/rubuxupab/jegjrxU/romiviwifofubakaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/mobirewin/iXMjjQl/21418928130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370078/normal_6010e627c692e.pdfIn PDF document text
    • https://cdn.sqhk.co/zulatobi/yib5Vgd/kisisosotodowetelitupulu.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/jcjaJjb/olympics_2020_dates_cancelled.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gaxilitexu.onlinewebshop.net/how_to_tie_loop_knot_with_braid.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/11110899244.pdfIn PDF document text
    • http://rukosivujuxu.atwebpages.com/40413245575.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/ffxiv_shadowbringers_class_guide.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_off0000e189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE189 5724 bytes
SHA-256: 93362e5e8943b535cec098e457eab1f064e8e3eaa93c5b977485c3adec15268d
font_01_sfnt_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 10208 bytes
SHA-256: c6f9681a25ec7b762c885c573ebab4345a62233a75057cdae80b85da77e3b8d7

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