Malicious PDF — malware analysis report

Static analysis result for SHA-256 449a684701f52edc…

MALICIOUS

PDF

74.6 KB Created: 2021-02-13 15:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f2be3833f5adf03b1eec2d027e503df0 SHA-1: 78e1cbd5a945c260d6bafc7e1a63b69a37224190 SHA-256: 449a684701f52edc319b86f19dc6dac47f0b5a7f40d5c089be90aa5f04c34260
154 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/123?utm_term=northern+cambria+borough PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469827/normal_5fd662ea6b72c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496810/normal_5ffb843d516a3.pdfIn PDF document text
    • http://shoop-fl.ru/car_racing_simulator_onlineay0l5.pdfIn PDF document text
    • http://avto-document.site/35553189735goo6d.pdfIn PDF document text
    • http://arfeshome.com/chrome_addon_facebook_videocuzbs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474475/normal_6009ab8e0cd8f.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/g5hhggL/stickman_ragdoll_2.pdfIn PDF document text
    • https://cdn.sqhk.co/depadukat/xgdsqjg/xisajaj.pdfIn PDF document text
    • https://cdn.sqhk.co/dutedape/jafFwgj/bird_sanctuary_chicago_address.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/icAgghc/xbox_one_x_hyperspace_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/DIghvS7/jogoretu.pdfIn PDF document text
    • https://cdn.sqhk.co/koxajavu/jrr2ie6/tewisikikoliwoxar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449614/normal_5fe1193216bfa.pdfIn PDF document text
    • http://mmuuue.space/crazy_climber_2frbo5.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/jarawaxanivu/donor_thank_you_letter_template.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_off0000e2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F9 5112 bytes
SHA-256: 08db7566a2224829a80d745df96acae6b0536686e601fc7df2588d2fbebff955
font_01_sfnt_off0000f43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 12084 bytes
SHA-256: 44cf170080f0e2028f3e634687c066b3a5780c565199043186cd8f5f31d20d6e

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