Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc2d147f33443d4…

MALICIOUS

PDF

62.5 KB Created: 2020-12-18 01:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 7247077952487a6e017339aeedffab55 SHA-1: 738a96d883440ae9abd3c228326d28565ed56c0e SHA-256: 4fc2d147f33443d4cbb65a90326a9b497f6e6094c1b09e32dfe5eb4dbc6ca0ea
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 'traffking.ru'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://traffking.ru/strik?utm_term=march+27+in+roman+numerals In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5fb9fdcf8c8ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368736/normal_5f87bf925ebdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456660/normal_5fb881616d412.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_5fa9948585910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490918/normal_5fac5a37a2c38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377697/normal_5fa935a956ede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_5fd8198d6c11e.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/bf65328a-4121-488b-9636-ac454c817cda/backpack_blower_rack_for_garage.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcdf7a1c83faa584acd44c2/t/5fcf66e401eaf4591e292e76/1607427812944/56632054096.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/67473060039.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51f41c30a162e0c6ddaa3/t/5fd669cc96ed101a3e4190a4/1607887312620/cheap_guided_tours_in_rome.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aefd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFD 2900 bytes
SHA-256: 40ce0bc9b113ef031639604f059b60aa9f1e41b097d60e75bfbf620cccc66306
font_01_sfnt_off0000b941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB941 5256 bytes
SHA-256: 58a0e30ec5fbc7acf654de367691602481ae42ac06b2babde66209ca0c28b635
font_02_sfnt_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 9908 bytes
SHA-256: 4e162f88f21c9099fb92db9065a56f5cc0b5b65a3e30b63d746624436e7a4482

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