Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae17d744312dbba3…

MALICIOUS

PDF

73.1 KB Created: 2020-11-14 20:02:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c867b4967faa7eb037f500318a79f1a0 SHA-1: 1c5579c691c2053c6d567bcd06ba2c2e69143474 SHA-256: ae17d744312dbba35374fb10f705ac60272715912b3817cfc8003abece7b4cc8
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs users to a website potentially related to phishing. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to malicious content, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafftec.ru/aws?utm_term=how+to+format+chicago+style
    • https://tawiwamukuzoba.weebly.com/uploads/1/3/4/5/134595143/gugawetuwo.pdf
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/lolazawake.pdf
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/7567972.pdf
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f8955d09a57e.pdf
    • https://cdn-cms.f-static.net/uploads/4409098/normal_5f9adffb78301.pdf
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/2916112.pdf
    • https://cdn-cms.f-static.net/uploads/4506159/normal_5fae9123e478d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/175b17b8-8c03-47ff-8400-817dbba6dc9e/vobozo.pdf
    • https://s3.amazonaws.com/zidosozawok/software_adobe_audition_bagas31.pdf
    • https://s3.amazonaws.com/zerepuzuze/86854406528.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e20b.bin
d7a1f361eb6dbb4836675d1444a39309bd2e078a7c59e63999d09404bf668c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE20B 5448 bytes
font_01_sfnt_off0000f481.bin
3741a5ee2bb29c32cb6b5c2af79179c3d4f10f02934094367d058c0eb767ea5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 10528 bytes

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