Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca0f9b78a40114f…

MALICIOUS

PDF

69.3 KB Created: 2020-12-17 11:55:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ecee5e1781daaf4372b6185d71134f34 SHA-1: c1160264714d70858acbbc8ef8b72ae469313c04 SHA-256: 8ca0f9b78a40114f3ddc33b953fbc44a27f45c7f4be93af309b90a6ab752e79f
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of a phishing or credential harvesting scheme. The PDF structure itself, along with the embedded URI, suggests an attempt to trick the user into visiting 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://trafftec.ru/123?utm_term=person+in+environment+theory PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5f99f089add3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5f94fcb9df8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_5fb7f38d6e3b4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/2019_answer_key_prmo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/950c045d-c9a5-40a6-8097-e043c621d317/game_genie_snes_value.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/20971026408.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/escola_de_administrao_cientfica.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/skids_and_mudflap_death.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/dictionary_arabic_to_bangla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e785c95-ded4-4bd9-bf9b-65b6f6cb2a2d/financial_reporting_and_analysis_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06150232-0d6b-406d-9956-117e98425964/lo-bak_trax_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc74c488-1877-4e50-91eb-78528e5ac7a5/duvijaxanij.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/financial_feasibility_excel_template.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_off0000d5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B3 4848 bytes
SHA-256: 92a92300ea350cdef2b46437ed9b21416bfac4343a7d76d2bc18e8f44ea124a0
font_01_sfnt_off0000e614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE614 10064 bytes
SHA-256: 780d64bcbf94ef640c08b81ec452b0fa53302ea04a8b269b033414a2ce950be1