Malicious PDF — malware analysis report

Static analysis result for SHA-256 c100702e244b17fd…

MALICIOUS

PDF

103.6 KB Created: 2021-02-15 09:06:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6e06a58a42ec1a0324dbd2c651b1447a SHA-1: 7fe79641ad06197bc93917b090adcfb2338862a0 SHA-256: c100702e244b17fdedc9ba8ce000fee2ced6717de2427eaff62714dbdbcbc160
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious phishing content. The 'SE_CALLBACK_LURE' heuristic indicates it's designed to trick users into calling a phone number, consistent with a tech-support scam or billing fraud pretext. The document body, though heavily obfuscated, appears to be a lure related to a 'Nascar ultimate speedway track set'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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) 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://druttle.ru/wix?keyword=nascar+ultimate+speedway+track+set PDF link annotation
    • http://megoribituvu.iblogger.org/company_balance_sheet_explanation.pdfIn PDF document text
    • http://mopasiwamosul.iblogger.org/81389610447.pdfIn PDF document text
    • http://nafugelinev.iblogger.org/wikemogurixumodiwe.pdfIn PDF document text
    • http://vesefotaso.iblogger.org/50021054796.pdfIn PDF document text
    • https://cdn.sqhk.co/lukapokobejo/ifjcEih/my_talking_tom_2_apk_download_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/zidenesek/PcHihbI/74129537374.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/Nhhjfjh/baxodowokopugatew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_600669603dfaf.pdfIn PDF document text
    • http://pojekofa.iblogger.org/poxadowukibuxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sadisuden.epizy.com/vazomarubamifoxubasobofuw.pdfIn PDF document text
    • http://bewegemoketofa.rf.gd/niwexuxanagimupuzolagu.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/41723853845.pdfIn PDF document text
    • http://riperuzitino.rf.gd/lefitafamuvumu.pdfIn PDF document text
    • http://rezexoguseg.epizy.com/how_to_apply_code_formatter_in_eclipse.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/fogadexutelumugafodev.pdfIn PDF document text
    • http://fobukisa.rf.gd/margaritaville_blender_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/gerd_guidelines_pediatrics.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/lujixabesidokizuvi.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_off00015655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15655 5444 bytes
SHA-256: 7996efa3fada9f227661dbec4295468af661a67c8986f30e26b0959770ac35b8
font_01_sfnt_off000168e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168E5 11276 bytes
SHA-256: 2b1a28f8305a8fbdcaf70c4a6a12be3b108abfe099f0a3fbad4b80b0076dfb67

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