Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c143055fb36aa0…

MALICIOUS

PDF

71.1 KB Created: 2021-01-07 21:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8e83d33ac72431816b6f13244e83ea85 SHA-1: e8d1c5fcaf2de3f53d9e7e8377b354ff0285a455 SHA-256: 15c143055fb36aa0fb356f877ed74247d1dd1ab6df1d6923a6c1b297bab84aff
96 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious site.

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://traffset.ru/aws?utm_term=baritone+ukulele+chord+bible+pdf PDF link annotation
    • https://cdn.sqhk.co/nanuvoxeva/jiiFjgQ/38318400131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_5fd85f6cd5369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387052/normal_5f9a13b642bbf.pdfIn PDF document text
    • https://woruvewuz.weebly.com/uploads/1/3/4/4/134400058/vipen.pdfIn PDF document text
    • https://cdn.sqhk.co/peferitukofa/ihdsijZ/jimititepib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f99e877a0611.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/KBje47t/top_10_gospel_songs_in_nigeria_2020.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/f6db1ec0-8bb7-414b-8f7e-008da0543a90/how_to_make_traffic_for_mstsc_full_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d8e289-0123-4e24-9fed-4892778dd48e/fedakisudazemanubamem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e00517-b1e2-471f-a83e-83138ea57569/sacrifice_definition_urban_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e02496ad-3fd4-41e4-84b3-7b8643c009c8/luwovodumuji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89efabcb-6a29-4f4b-8c81-02290182c68e/move_your_stuff_change_your_life.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_off0000db54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB54 5320 bytes
SHA-256: 1144becd07504bccd2731e3db86aa924b81e70b8bfd53787aac9662eac2d2212
font_01_sfnt_off0000ed64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 10100 bytes
SHA-256: 58cfa2ce5cdbead240625d8637c59fc1b9052311bb8cb272737b793f40df687d