Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6e38b21768c398f…

MALICIOUS

PDF

74.0 KB Created: 2020-11-17 20:02:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c221a1d48f1a4f91460213da8dbe0a6b SHA-1: 11d8defbbff9d6aade968ccd695f70a907121ad1 SHA-256: f6e38b21768c398f24eda6dccedac56bb62c8f8788a2841918c03bda642ea6a5
154 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 'traffmen.ru'. ClamAV also detected the file as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of a malicious URL strongly suggests an attempt to lure the user to a compromised site for further malicious activity, such as phishing or downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://traffmen.ru/strik?utm_term=donkey+kong+country+rom+emuparadise In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470552/normal_5fa5d7cbdce19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_5fa6c0c99547e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_5f9eac9b96447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471719/normal_5faa1b7dcfb84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379231/normal_5f9a4e244f1f9.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/vixuwogetiv/bsc_1st_year_syllabus_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315de20f-9bdc-45f6-99d6-7f6610acb515/78814001288.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961f2279-c7ea-473b-81fb-d38e18ed987a/ejercicios_acentuacin_valenciano.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/austin_powers_comic_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c17fb06-2770-463b-b303-42fab1a30f83/31443444146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3d7897-74ba-4873-a545-0d6ed3910dfa/23614817782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d4817b-df78-488f-a9be-ea123240ad76/poninebopamov.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_off0000d572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 5528 bytes
SHA-256: 2500cc9d5cca304a1a38ee714240e313e7668fd120e64c427e4010346f7843c0
font_01_sfnt_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 16552 bytes
SHA-256: a04e87e9a2b50dd789d2b1f1a06a6d474ffdfab496b252b45c70e0dc8a701b53

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