Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa634f36dc6cd7f…

MALICIOUS

PDF

67.6 KB Created: 2021-03-01 23:33:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 33344194dc14e543ccaf672f9314ba02 SHA-1: 33316fa025da287fc5b0ecbebb35e80b747a18f6 SHA-256: 8aa634f36dc6cd7f32353a83e00169ad37c620f46f1e70864a1a5f2e3722267f
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wix?keyword=eastwood+mig+175+manual PDF link annotation
    • https://cdn.sqhk.co/zoluxoni/hgjjgha/run_fast_run_game_download.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/6P3jcZR/77116196242.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/btijbtW/pico_rivera_animal_hospital_ear_cropping.pdfIn PDF document text
    • http://kartaidatodemeleri.com/equaes_e_inequaes_trigonomtricasr5qcc.pdfIn PDF document text
    • https://nonejazusedebe.weebly.com/uploads/1/3/6/0/136099570/9807214.pdfIn PDF document text
    • https://cdn.sqhk.co/dedenijikal/qCjcCxc/lutafadugadowojigi.pdfIn PDF document text
    • http://bloomwithdeanna.com/32284528929qp7gh.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/jccgjii/download_game_bushido_saga_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408984/normal_5fd09294e69a0.pdfIn PDF document text
    • http://xijilufaligamox.22web.org/38531490774.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizamazibenu.rf.gd/ignou_b._ed_books.pdfIn PDF document text
    • http://nanoxamovafosox.epizy.com/common_half_yearly_examination_2018_answer_key.pdfIn PDF document text
    • http://dafesofuxub.rf.gd/wuvugokanatofugejufuwuzin.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/alphabet_arabe_apprendre.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/fowusowizenaguliripi.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/13037280429.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_off0000ca1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1C 5356 bytes
SHA-256: 0ec33bc8b199b70065245e203f6e31e366b2a51caa81b6d88b7a1c608299d70a
font_01_sfnt_off0000dc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC68 11068 bytes
SHA-256: 91f7e0fae92756561a14d5615109277877470a5853ceb4f25877084308642ca6

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