Malicious PDF — malware analysis report

Static analysis result for SHA-256 951f5e6511f532ce…

MALICIOUS

PDF

78.6 KB Created: 2021-03-24 09:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f53c5c35d612e3b0e214f0a220c0b326 SHA-1: bf5d5e25015eb14c624da36681a377aab433e244 SHA-256: 951f5e6511f532ce96c8c9873aa04fb278592708e0c11eacf7fa131ce4149291
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of 'cheat apk' in a URL and the 'invoice/payment lure' heuristic indicate a likely scam. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery, potentially via embedded JavaScript or other exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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) 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://botokaw.ru/wix?keyword=trials+frontier+cheat+apk PDF link annotation
    • https://cdn.sqhk.co/zowolanazew/0hgOgeK/dragon_hunters_cartoon_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407081/normal_5ff0165c9ceb6.pdfIn PDF document text
    • https://cdn.sqhk.co/dagorabowixu/hddYGjd/share_all_file_transfer_and_data_share_anything.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/twhiahd/at_t_u-_verse_tv_u200_latino.pdfIn PDF document text
    • https://cdn.sqhk.co/kokojisip/ciahdC0/sedekonavozon.pdfIn PDF document text
    • http://kakorofiwe.22web.org/brother_1034d_tension_settings.pdfIn PDF document text
    • https://cdn.sqhk.co/nufesewepi/gguijji/lusufinidobuwisos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455207/normal_5fed13f5bdafc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_5fd62fef1eedd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibikefogive.epizy.com/soroban_abacus_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/vepapalumogod.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/tnpsc_aptitude_formulas.pdfIn PDF document text
    • http://ruvedinaz.rf.gd/mimeb.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/zuxozabaxemijikulejov.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/bebaxexa.pdfIn PDF document text
    • http://kimawawasero.onlinewebshop.net/24571010137.pdfIn PDF document text
    • http://suwuriru.onlinewebshop.net/cecil_textbook_of_medicine_26th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/miwod.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_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 5116 bytes
SHA-256: 9d241cc09db20327f1a39188fbf74b510f363dca7df05f582a728234b029dd1f
font_01_sfnt_off00010465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10465 12216 bytes
SHA-256: ba43319d6dc0de0407f4b94918e29482889911e986e7e318ba5b466ff2523037

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