Malicious PDF — malware analysis report

Static analysis result for SHA-256 b663bbe13d076e29…

MALICIOUS

PDF

64.7 KB Created: 2020-11-23 03:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 00c0b23a1a2400148fdd9108d0dd7b3b SHA-1: ad00117e8ea045a6b46e2eb24fdc4ec19fb975e9 SHA-256: b663bbe13d076e29ea629f3c1ced7d0292496f458995985e3619c1542b2a9f19
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'traffset.ru' was extracted, which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', suggesting it might be a generated document used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://traffset.ru/123?utm_term=ogden+spa+in+aurora+illinois PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413713/normal_5f97196c38b4d.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/jewizopukuni/cosumnes_river_college_counseling.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/dufefise.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/5813791050.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/zitujogofurogiw.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/new_release_movies_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/56584915447.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/collision_reporting_centre_milton_on_l9t_5g2.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF03 5152 bytes
SHA-256: 4c045d5f32ad9e22c63f610b280d4753b95adeb5ce6a588c6193190f1d4cf7c0
font_01_sfnt_off0000c08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08C 4076 bytes
SHA-256: 0bcea8c0a9aa1fc23ef3597b2ccc62e3c995321f84d53c984a0a7c5a58d4282e
font_02_sfnt_off0000d003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD003 11256 bytes
SHA-256: fbc6884c0dc9c20796219ccda5453be7f0cb1a5769231ebc5282e96a7c1d79ee

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