Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a451fd1e124b782…

MALICIOUS

PDF

82.7 KB Created: 2020-12-08 02:42:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 05ddfa3b8f1452e027108c8e2c694724 SHA-1: 1d1a46290b317aae0eb21ee13d3006c26e178470 SHA-256: 5a451fd1e124b782724c6b3495fa6916bc6befeb095548bb2b7c66d432eea59e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/123?utm_term=neet+2017+code+x+answer+key PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464302/normal_5fc7081fe0453.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424349/normal_5fc55ae4dad36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405208/normal_5f98010834dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469860/normal_5fa5b0df895c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464311/normal_5fc5f295491cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f9b1c06991d3.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/07febc82-2950-4bae-a249-6874c9813f5a/32881155976.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10620bf71053ccb10dd13/t/5fc1b2ca173fb5383be24d45/1606529739773/azur_lane_pvp_tier_list_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc699d1e2fce462bcb38289/t/5fca670ba417265e29c2792e/1607100171971/lyrical_songs_about_growing_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c843316-2fe8-4c80-9a92-255bc268238a/emerson_lc320em2_stand.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6688173fb5383b9a7939/1606379144576/rc_grave_digger_traxxas.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144361c8c7413143450ce/t/5fc76e1f0623334b0c609e38/1606905376192/27612588923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3881168d-afb0-405d-b78a-445c5283cc88/xexiwagegufanokurujukegi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c6a4a87939686407af5f/t/5fc2f15018e72e5fdb396dd4/1606611281268/99610596136.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 5600 bytes
SHA-256: ea0ce79567a61ecf042aca4794682ff2bd6f4bdfdc5ddca3feab81153e51be3b
font_01_sfnt_off000102a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A8 10920 bytes
SHA-256: 7d4fc3139cc1108f9f0cdefaeecd90f3c38d26273701e8134b781501c7a8f3c5
font_02_sfnt_off00012837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12837 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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