Malicious PDF — malware analysis report

Static analysis result for SHA-256 7329bf1211e90388…

MALICIOUS

PDF

69.2 KB Created: 2020-12-14 21:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 13ebe969375ab2a37df95c9e5bf02105 SHA-1: 1d5a6c9ab9588c1987b48268550b7b57ed09e288 SHA-256: 7329bf1211e90388782c36e1af17c6c9b0e31b76fa15dd1b797a111729a44956
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'traffine.ru'. Additionally, a machine learning classifier flagged the PDF with high confidence, and ClamAV detected it as a phishing trojan. The document body contains text related to 'employee login', suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffine.ru/123?utm_term=l+brands+aces+employee+login In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_5fa2036ef4212.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_5fc85e69d35a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_5fa92c9bab23d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_5fbed2bbd152c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_5f9aab21e26cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f86f545552e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379626/normal_5fcaf2f93683f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f97e5a06583e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be6f67c-ca4e-445e-9f4b-2f151916a95f/world_conqueror_4_modern_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b11ba3c-c384-4de9-a160-4103f9b67016/labour_day_in_india_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a06721-33f3-4644-a4e1-0cb81d78e636/rusumovirulize.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37d0aec917750a3e81c42/t/5fc4e9695147b14804cc9a66/1606740329546/rimawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fab15de-c8be-42d0-a4df-f668dbd35a1a/78813222283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b844405-58a5-4f03-91d9-9740f2b028a2/74371571227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5392012-7d2f-44b7-9430-6170f740a717/vegelelopifetilivasupiper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad1a3538-6346-4968-8cbf-051363523e0c/rajizezizozuman.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_off0000d0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B6 5576 bytes
SHA-256: d3eae06fbd1b44bbde2c238eedee0bcb0e4019915fa1821b48017517f547b0e2
font_01_sfnt_off0000e398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE398 10664 bytes
SHA-256: baf52c4e5255de4944be5bdfc7b74a9c25278a92aebaf1d852ab6cff76395bdc

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