Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f3471d7b1316cd…

MALICIOUS

PDF

72.1 KB Created: 2021-02-27 07:20:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 87c29d8d1b495144bce3f17ec6949601 SHA-1: 1d6e10223aa942915c7f0f5985710b9d4a9a40b1 SHA-256: 57f3471d7b1316cd99661c69af55c5c0e4c69f03938de30d33e60f4e857a1d29
146 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://fokemale.ru/award?keyword=va+citrix+gateway+login PDF link annotation
    • http://xegazinijitup.mywebcommunity.org/now_taking_boyfriend_applications.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387929/normal_5ff1b0e0bf995.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/what_is_involved_in_a_final_building_inspection.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/bergeys_manual_of_determinative_bacteriology_latest_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/O8ifgih/tip_top_barbershop_grande_prairie.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fd0b7a45e506.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/j5wBp5Z/alwar_viral_video_on_social_media.pdfIn PDF document text
    • http://xexapitanegis.getenjoyment.net/2000_jeep_grand_cherokee_limited_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_60334f6a9e06b.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/sonubaxusa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472216/normal_60013bad2c54a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476418/normal_5ff692415d8ab.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/45689972441.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/sipamojonedutuxekix.pdfIn PDF document text
    • https://cdn.sqhk.co/rirakibugo/hjepiet/51890631497.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/nail_salon_open_today_sunday_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://citrixaccess.va.gov/In 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_off0000ded1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED1 5016 bytes
SHA-256: f5b2a7afb16c24baa278ca06d5cba76f6ac45110391ec44ceaf2f74124ffea28
font_01_sfnt_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 10400 bytes
SHA-256: 18e5f2feb384a75d94650dc4eb1262319a53af7765bdfc82f8222ea04e7053d4