Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbfcb282e82cfb7…

MALICIOUS

PDF

71.8 KB Created: 2020-12-22 01:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e905bd7b25ee221b91f5dee7c0b58c0 SHA-1: 724777d7371c0229b90a0cac47319f187af5d14e SHA-256: 3cbfcb282e82cfb748bf5bc3a12047f7c8012451ea586ecd9674ab59ec7e9bf3
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffking.ru', which is likely part of the phishing lure. Although no explicit script was found, the nature of the detection and the embedded URL suggest an attempt to redirect the user to a malicious site for further compromise.

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
  • 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://traffking.ru/strik?utm_term=fs17+spectacle+island+ferry
    • https://cdn-cms.f-static.net/uploads/4381539/normal_5fd650091b580.pdf
    • https://cdn-cms.f-static.net/uploads/4458412/normal_5fa0e346b291c.pdf
    • https://static.s123-cdn-static.com/uploads/4465250/normal_5fdd11e75ffed.pdf
    • https://cdn-cms.f-static.net/uploads/4489977/normal_5fbcbaae2f876.pdf
    • https://cdn-cms.f-static.net/uploads/4409238/normal_5f96a282464de.pdf
    • https://static.s123-cdn-static.com/uploads/4402948/normal_5fde9e894c753.pdf
    • https://cdn-cms.f-static.net/uploads/4368478/normal_5f8834face774.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc5af5f12facd59cecdbb78/t/5fd6b3a4ab777271769bf230/1607906214638/xewoni.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0667f3de5e49b52b051f/1606288999631/67530867223.pdf
    • https://uploads.strikinglycdn.com/files/1816eed8-e06f-406f-945b-1b66c2ce7133/tenim.pdf
    • https://uploads.strikinglycdn.com/files/6ea18dfe-13cd-4461-93f7-f3ae8145c9cb/music_production_books.pdf
    • https://uploads.strikinglycdn.com/files/ab735604-7421-4d68-911a-57a02a0f9570/mtf_hair_guide.pdf
    • https://uploads.strikinglycdn.com/files/f8fe57c0-baee-4a5f-8586-6ae975f64532/st205_75d15_trailer_tire.pdf
    • https://uploads.strikinglycdn.com/files/c2313e29-f6bf-4a25-b8b5-fcafef17b5b7/59418042943.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c55a.bin
1674c10841a2ad1859e45ac1366040ba4d89f0f98084e0a2e4a7212b38a02aac
pdf-font-stream PDF embedded font (sfnt) at offset 0xC55A 5336 bytes
font_01_sfnt_off0000d7a6.bin
c1c61a649df466cd0b295de6cbb8ae016b434221fc32307a9205274ee7aeb91c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A6 10436 bytes
font_02_sfnt_off0000fbbc.bin
ed614ff3ac2e387b3dffe3adc8533a73dd514e171fc201cb60d70b5b5a32e0ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBC 16196 bytes