Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5543328e985fa6…

MALICIOUS

PDF

71.2 KB Created: 2021-02-22 23:08:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 04e1e2dd5cd5e2031b4cdb7cc02b15ee SHA-1: 107fc3b04d98a29c6f2c9407150f382901e777d4 SHA-256: 8b5543328e985fa612abfded6a8afc070442402f883acb83eadb45104bb6bb06
244 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
  • 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/wix?keyword=coin+master+free+spins+2019+no+human+verification In PDF document text
    • https://jexewibovagajuk.weebly.com/uploads/1/3/4/4/134485971/juritekowo.pdfIn PDF document text
    • https://cdn.sqhk.co/muwitajo/hjbphaY/beroge.pdfIn PDF document text
    • https://jawejeletisib.weebly.com/uploads/1/3/4/8/134886371/79cf21b487.pdfIn PDF document text
    • http://esclick.pro/life_after_death_book_by_deepak_chopradx9q1.pdfIn PDF document text
    • http://sandiego-podcasts.com/zaxemefunudikemuxomuxodibb0g8c.pdfIn PDF document text
    • https://jitipukojid.weebly.com/uploads/1/3/4/7/134707402/lajet-zuxoba-suvimeduvafe.pdfIn PDF document text
    • http://dirtygirl.fun/somokovusexnyxw.pdfIn PDF document text
    • http://natur-green.fun/do_i_need_a_highschool_diploma_to_be_a_real_estate_agenthi8ml.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/174d9bad.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/280f0d2.pdfIn PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/dusufamuwizaf-fuvowa-gomibulere.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/WFhfuDy/dream_league_soccer_kits_barcelona_2020_kuchalana.pdfIn PDF document text
    • https://bukuduribo.weebly.com/uploads/1/3/1/4/131454389/7479493.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/DWhdQjb/710_espn_seattle_twitter.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/rawesaragegugar/axe_io_brutal_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/savokupeme.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_off0000d701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD701 5672 bytes
SHA-256: 8af07cdc76071d940c2083d9fba9bcdb47e84bda0b75cf2d5d1e5fe359bb9fe6
font_01_sfnt_off0000ea24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA24 10736 bytes
SHA-256: dec480a0da7181a6b47112e6abdff1ad54afb3d236c4b3c1d7bd2287d50bbe9d

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