Malicious PDF — malware analysis report

Static analysis result for SHA-256 475b34edf6d12520…

MALICIOUS

PDF

67.8 KB Created: 2020-12-20 12:17:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6d8b92a035b6f32a9b7abc1ec1e00c78 SHA-1: ead47187b35ed6dc8dce034bdf6213b4eb2c3de9 SHA-256: 475b34edf6d125200637ca4ef63ff948ea8fc8d09547c0b90f79d83926fd0474
104 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, with a high risk score. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution domain. The heuristic 'SE_URGENCY_LURE' suggests the document attempts to create a false sense of urgency to prompt user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/123?utm_term=food+grade+silicone+sealant PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415530/normal_5fab9900a0294.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5fb2b59eb4c43.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/bitajemisajoz/denetesuf.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdcabee0a190b16b315d1db/t/5fdd29dd459323513baee659/1608329693869/77121072487.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/conan_2d20_character_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/3035679983.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc78ab781da8a590db12154/t/5fc8655d094cf7617dbfacdc/1606968670133/24470427692.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/xonim.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/destiny_2_reset_guide_reddit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ed1560f2895dc1e7fe11/t/5fc11f0fe18c5c478e23c7ee/1606491920041/49521358929.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/92527071256.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/tinenafixotuxuj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1ca817d0c8f249d471d79/t/5fcc564505ddc9599d16fac6/1607226950097/memento_de_schemas_electriques_gratuit.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/58339383974.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_off0000ccbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBF 5060 bytes
SHA-256: ca1e007d1e5595bffeea95f39b44ccfdb093997805266451cb460ec7c1d03025
font_01_sfnt_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 10744 bytes
SHA-256: 258db9c06a1c693d06519f00fdf8a817ba183fbf55447c937e34d8daa67d4d16

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