Malicious PDF — malware analysis report

Static analysis result for SHA-256 6396b89c3f567538…

MALICIOUS

PDF

108.0 KB Created: 2021-01-22 03:20:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce62c31fa1fb309af54a2391c6a695f4 SHA-1: 5978126fa65d2d167044043c1f94afa5f107bde6 SHA-256: 6396b89c3f56753879f2251cae4f84f1dba9b93cb7da2446306d32deee49b9a4
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, suggests a lure related to worksheets or guides, consistent with phishing tactics.

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://trafftec.ru/123?utm_term=adding+doubles+plus+2+worksheets
    • https://cdn-cms.f-static.net/uploads/4485710/normal_5fd234570c53f.pdf
    • https://site-1228379.mozfiles.com/files/1228379/kingdom_two_crowns_winter_guide.pdf
    • https://site-1175941.mozfiles.com/files/1175941/weezer_say_it_ain_t_so_lyrics_video.pdf
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5fe59a2fc65f2.pdf
    • https://site-1181076.mozfiles.com/files/1181076/bmp_converter_to_jpg_free.pdf
    • https://static.s123-cdn-static.com/uploads/4530990/normal_5fcd510846615.pdf
    • https://site-1168487.mozfiles.com/files/1168487/racing_moto_game_app.pdf
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fe02735b468d.pdf
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5ff17e1b8d908.pdf
    • https://static.s123-cdn-static.com/uploads/4408702/normal_5fe2bcbf15dbe.pdf
    • https://static.s123-cdn-static.com/uploads/4404976/normal_5ff02464b66d3.pdf
    • https://static.s123-cdn-static.com/uploads/4478398/normal_5ff4968869b20.pdf
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5fe44b88b1cd4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pexevogawi.epizy.com/cursive_handwriting_sheets_ks1.pdf
    • http://dezezefisimel.rf.gd/archivist_d_d_3._5_guide.pdf
    • https://s3.amazonaws.com/jenisozazewubo/63525690802.pdf
    • http://nifekubipaxo.epizy.com/announcing_new_employees_template.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016cac.bin
8f9506a90f87c37f1c9bd0b77d9b95a49dc18e9e8713e0a777af4d257c654af8
pdf-font-stream PDF embedded font (sfnt) at offset 0x16CAC 5428 bytes
font_01_sfnt_off00017f2f.bin
e767e113748b8e3a2b5177a73a4d5d2826cb42c5754143828208097521cf3509
pdf-font-stream PDF embedded font (sfnt) at offset 0x17F2F 10532 bytes