Malicious PDF — malware analysis report

Static analysis result for SHA-256 04f4716704e1a679…

MALICIOUS

PDF

65.4 KB Created: 2020-12-01 18:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 31a227ff0beb8f5cff7a7eadc5144f3c SHA-1: 04041fdc44e2a104d9850bdd942aa09c25cba0c3 SHA-256: 04f4716704e1a679657374ebc1d10f3419554a2ab3ac8079b2279108321d13cf
234 Risk Score

Malware Insights

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

This PDF file contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to 'Tri state medical napoleon ohio', suggesting a targeted lure. The presence of a callback phishing lure heuristic further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://cctraff.ru/strik?utm_term=tri+state+medical+napoleon+ohio In PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/duzalef-gukegalawafaw.pdfIn PDF document text
    • https://jujodupif.weebly.com/uploads/1/3/2/3/132303189/32f5a6f.pdfIn PDF document text
    • https://rugulobasogaje.weebly.com/uploads/1/3/4/7/134770789/8581eefb1f236.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e863485235c86bcd5fb/1606373001066/45863021853.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/nudolujatiwekef.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/faboxijukakinoj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc170deeaf37e3b64d29c5d/1606512864885/smotherwing_butterfly_farming_botw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35998986-07f3-4ed1-b67b-16c81be275d1/searching_for_summer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/dactylic_hexameter.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/90563524848.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/bonikowok.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_off0000c3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C7 5260 bytes
SHA-256: 94e0e7fb6a02869cb7e8b0b9813defcc3e3f867bcb6cf6f65ed533451ffa226f
font_01_sfnt_off0000d575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD575 10540 bytes
SHA-256: 135d2ff22380816bb919482aa3058012c5f6e90e16b45ef881a12f69ba9546ca

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