Malicious PDF — malware analysis report

Static analysis result for SHA-256 8172cce02774d36f…

MALICIOUS

PDF

76.8 KB Created: 2021-01-12 12:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5644e9d70f5f24a62d3fc81cde61a2df SHA-1: 45ca73f6a452610050685fe2f2be24dbb16c251e SHA-256: 8172cce02774d36f5e1700379dd2ba88cc572d55cdffd93aa38b3ff25bbe28ba
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document, possibly a fake download link for game maps.

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://trafffi.ru/aws?utm_term=company+of+heroes+skirmish+maps+free PDF link annotation
    • https://cdn.sqhk.co/gitesafuwu/gjbhcji/developing_management_skills_3rd_edition.pdfIn PDF document text
    • https://totelulipax.weebly.com/uploads/1/3/4/4/134469391/6396159.pdfIn PDF document text
    • https://cdn.sqhk.co/zigimovovu/R5b9Dc1/bedudolipolewisupupinijum.pdfIn PDF document text
    • https://ketawisu.weebly.com/uploads/1/3/1/4/131454029/7584668.pdfIn PDF document text
    • https://site-1172757.mozfiles.com/files/1172757/forgotten_hill_mementoes_poki.pdfIn PDF document text
    • https://cdn.sqhk.co/vujixete/qpWzhgY/wekoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5fea36ef85398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450419/normal_5ffa45b64540e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368496/normal_5ffce1c3ab68b.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/luropi/airbus_a300_flight_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/3_year_old_alphabet_worksheets.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD954 5180 bytes
SHA-256: 275c0c3c2a47d80158d4f33e215bd8c6d22f295200a1608a21f1a03d034fb7e2
font_01_sfnt_off0000ead4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 10960 bytes
SHA-256: 5230d31b473211ba409c0853a7beea3885ce34ffa49992f61651eb9e262a083d
font_02_sfnt_off0001103b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103B 16332 bytes
SHA-256: 69d723212eb6dd1954cef9b4649bd4df6eb17a6f495b2db8137d34beed6776af