Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc65886b1fe42dd…

MALICIOUS

PDF

67.7 KB Created: 2021-03-04 06:45:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fba40af5252a7b01fb6393ef18fd81a8 SHA-1: 712f378526d42289325d67e1fd10a78c1031b202 SHA-256: 3fc65886b1fe42dd9f4c59b28f67b35e8b6ee6aa878754a4a52e7a3c8b738e1c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://botokaw.ru/wb?keyword=cobra%20microtalk%20cxt145%20manual PDF link annotation
    • https://lolizafopig.weebly.com/uploads/1/3/1/4/131453679/goxese.pdfIn PDF document text
    • https://guvefivilemu.weebly.com/uploads/1/3/4/3/134397682/gexubusekirutuz.pdfIn PDF document text
    • https://tofabefanij.weebly.com/uploads/1/3/4/7/134726630/ruruwumuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_601b8b473b3cf.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/tubigugimokujawutuxuli.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/how_much_does_corian_cost_compared_to_granite.pdfIn PDF document text
    • https://zixokamewi.weebly.com/uploads/1/3/4/3/134386319/sujejavalomi-pulun-vufilesip.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/kivobugilukisakiw.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/el_general_naranjo_caracol_tv_en_vivo.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/4764024926.pdfIn PDF document text
    • https://lonokowikur.weebly.com/uploads/1/3/5/3/135384913/sakenaxazut.pdfIn PDF document text
    • https://wawogikaso.weebly.com/uploads/1/3/4/7/134726687/1515431.pdfIn PDF document text
    • https://dagagiketilijo.weebly.com/uploads/1/3/4/3/134312633/wenupesizi.pdfIn PDF document text
    • https://falevuwutote.weebly.com/uploads/1/3/5/3/135301590/veludubi-zupugejuxog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farokof/icd_10_code_former_smoker.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_off0000cd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8E 5208 bytes
SHA-256: bbc8edc950279de2455a9fad71473596ac61c986e00481b7036797144ac6f9d7
font_01_sfnt_off0000df3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 10184 bytes
SHA-256: 071410a6e49c8f5d6323069e938864ec02d47da377404dcfff8d85c420cdd06f

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