Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc93fa4fbc2c951…

MALICIOUS

PDF

79.5 KB Created: 2020-11-29 15:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b81df22ed79ee12e7836b1b3bc8e12ba SHA-1: 9c4eaca7852aff8e74c1f6c1bc80f7bd1f73b0f4 SHA-256: 4cc93fa4fbc2c951be1187ed9f76eabf0f0c58ee2252a08150810a3f6ea9a48e
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 'trafffi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to a 'bike simulator game for pc free'. No scripts were extracted, but the presence of external URIs and the overall classification strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=bike+simulator+game+for+pc+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5fa770bc92512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366040/normal_5f966af93820f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482012/normal_5fb2f2f659cce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450003/normal_5fad21478f828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f92353bf416e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393358/normal_5fad944715f05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f8a214e2ef11.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/magapeguwabe/fegogemubajiwe.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/baxi_solo_24_he_boiler_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/personification_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/wogegevubaralevuvi.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/definition_of_web_2.0_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/battlerager_5e_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d451e9-0e0d-4e4a-9f82-48b553443620/9524524259.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_off0000fa1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1D 5448 bytes
SHA-256: 51bb146061a0015fbd6352046f57afa2bf052d09bd31b642184b4988fa91eabb
font_01_sfnt_off00010c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9D 10660 bytes
SHA-256: 7b3824c2c6fe37918368c7ef2a79c7e2b3a8fe2bacef1351ed84aab09432ed38