Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0577124dccbe642…

MALICIOUS

PDF

72.5 KB Created: 2021-02-28 08:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 04dd815ad575e0e21cd81121c2c34cda SHA-1: 62d9d8a48a35af6b59eeb8598f84f67ccfdcafd9 SHA-256: a0577124dccbe6425efc53d92ad4f993031a9a33073cb9202cf54cfe78d158cf
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://yafferge.ru/123?utm_term=how+to+light+the+pilot+on+gas+heater In PDF document text
    • https://ziwegakesamud.weebly.com/uploads/1/3/4/4/134468237/e447d.pdfIn PDF document text
    • https://kajanivok.weebly.com/uploads/1/3/2/8/132814977/depesifiwalejovada.pdfIn PDF document text
    • https://cdn.sqhk.co/bumotinidopi/icWghge/free_robux_giveaway_tips_download_pc.pdfIn PDF document text
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/dixabazaxavorope.pdfIn PDF document text
    • http://mestorating.ru/app_for_bsnl_recharge_bsnl_balance_checkingu227h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384149/normal_60006b7f388fb.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/Y4lVij2/rome_total_war_mods_steam.pdfIn PDF document text
    • https://cdn.sqhk.co/nibedogoxov/7cPzShh/bekidaselima.pdfIn PDF document text
    • https://cdn.sqhk.co/mebosuxular/aidhbx9/cold_war_release_date_call_of_duty.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/ji7ibQZ/4880928620.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/juxemodolatetufopuq2bve.pdfIn PDF document text
    • http://sy0n.icu/various_daylife_apka1k4q.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/FjhjchL/9018684446.pdfIn PDF document text
    • https://cdn.sqhk.co/wepenujofow/hdihUig/40839000181.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wijinap.rf.gd/eso_bloodroot_forge_normal_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_off0000df60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF60 5136 bytes
SHA-256: 8270400df0630a59512982bf31ff3669a749e00fa8efca7d1df6f1997f98e8d6
font_01_sfnt_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 10628 bytes
SHA-256: 2518f651f8fd27f5b42588f7beec720d15348a9e69a81f6b00f5ace7fda25345

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