Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8231620f68f5057…

MALICIOUS

PDF

60.0 KB Created: 2020-12-20 17:51:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d24556a71903c82cf36626f7cd402d97 SHA-1: 28c4ef819bb47778cad71e57ebd6b4f6642e315e SHA-256: c8231620f68f5057e76af54123ec1ad2b66a7651540a776352a0b483201bfbf9
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 'trafftec.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to "secret pdf in gujarati", aligning with a phishing attempt to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=the+secret+pdf+in+gujarati PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488329/normal_5fac1b4aafb31.pdfIn PDF document text
    • https://ranuxibat.weebly.com/uploads/1/3/4/5/134595997/nowas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5f90487545d69.pdfIn PDF document text
    • https://poxotedodesogin.weebly.com/uploads/1/3/4/3/134305686/8e914.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/faxulaluzus.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/tesasubawalozan/91398743357.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52c3c2e537a05ef24d470/t/5fcddbbe9aa2de0c64b5bf78/1607326657551/pukitimevokobu.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/vuraw.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/kigekojilipuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/nejixevekubaxopezaxo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c66b27a199023ab4af32/t/5fc1a70a145a8629dceef4de/1606526730999/23201367544.pdfIn PDF document text
    • https://s3.amazonaws.com/bovenotojitowe/a0_size_powerpoint_poster_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_off0000ae9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9D 5412 bytes
SHA-256: 1d9126b1f058f34e4ba2eb4a9001e9869d3ffdfaa64f1d787846a470c9495d9c
font_01_sfnt_off0000c108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC108 10104 bytes
SHA-256: 57c96c9f063e2aafe2a480cc42945161bc7f2bc9206a03d58fd95129ab186aed