Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3508c70b7a1e313…

MALICIOUS

PDF

71.1 KB Created: 2021-02-27 02:24:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5b69a7924979d0eaa8e0e92f1bcbd1ba SHA-1: 8dd07bf405c598bf8fcfcabf9eaec0f94f525d28 SHA-256: f3508c70b7a1e3131129b774488dfb8bb9fe8b29aa0c6fab3d5dafb2ddbb149c
186 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
  • 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://dugedepap.ru/wix?keyword=rock+pocket+mice+video+worksheet PDF link annotation
    • https://cdn.sqhk.co/kalusoxat/bmoUwR7/nanalomatelibenevefex.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/g10jc0F/kekuki.pdfIn PDF document text
    • https://cdn.sqhk.co/wunasesev/HXVjcmN/56465915799.pdfIn PDF document text
    • https://cdn.sqhk.co/pigexebobe/FNoMUgg/42126676630.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/71607666405.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/jjhtjia/tifututafujotovoziv.pdfIn PDF document text
    • https://jukosixosibi.weebly.com/uploads/1/3/1/8/131871462/valapit-kajoli.pdfIn PDF document text
    • https://cdn.sqhk.co/nodewanase/qoYjeI8/basketball_falling_back.pdfIn PDF document text
    • https://fogunovavak.weebly.com/uploads/1/3/2/6/132681822/xefisadiji_wokomal.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/how_much_does_periodontal_gum_surgery_cost.pdfIn PDF document text
    • http://retamos.mygamesonline.org/47543161911.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491927/normal_5fc95268ba53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417531/normal_6013a2eb22d0c.pdfIn PDF document text
    • http://wijetaz.mypressonline.com/hoi4_black_ice_division_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/eggEgT8/dirt_bike_track_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456393/normal_6029544613746.pdfIn PDF document text
    • http://dududuw.mypressonline.com/bobefexezifutolu.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/jcgfRii/dibifajuduliba.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/jD5RBrn/shadow_lcd_samsung_s8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409818/normal_603409f1e1357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedisijusa.onlinewebshop.net/novabitoxefofaxokajewa.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_off0000da67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA67 5296 bytes
SHA-256: f4382a3a2c06474da09b94c9fbb2ed91c83e3f7ae08f45d4364f35de3e769a0f
font_01_sfnt_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 10132 bytes
SHA-256: 7e7c0c7175bfe7895aa7ded75f40663cc5055270f0b36c879f1b4ce923f9dc41

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