Malicious PDF — malware analysis report

Static analysis result for SHA-256 e336c16b93d1aaec…

MALICIOUS

PDF

111.5 KB Created: 2020-11-26 22:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 23db9930e8a468d84ee1aa25ba120905 SHA-1: e691e9ba250069a1179f6a7dc8913c413d89163f SHA-256: e336c16b93d1aaecec5785827435c140cb84b5c375ce51890ea9ac61c6052637
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL, 'https://trafffe.ru/strik?utm_term=swiss+lap+top+bags', suggests a phishing or scam campaign related to product sales. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=swiss+lap+top+bags PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382949/normal_5fae478708c91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fba1cdd0f188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5fa9b3482a4c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_5fb5f2004fb08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413228/normal_5fa029f7bdda3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f901effaa900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f9d0ed98073f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454546/normal_5fbee213891a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484631/normal_5fbe2f000895e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_5f96188573928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482009/normal_5fada3c9dbde5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5fb48e1cbd3b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5fa7339387576.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/mokamoba/xadiwelejawil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07580441-bfda-45fa-8ab7-cf5604fb5255/classification_of_matter_pogil_answer_key.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_off00017c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C46 5224 bytes
SHA-256: ff375a4dfb84d568dfc0302d9843c1acb10d5c2feccd94629d1dcace392e9d0b
font_01_sfnt_off00018e2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E2E 10288 bytes
SHA-256: 6d134568e6cdf2e956eae19bedf3e83989e37d9585530b005e8cebba7646d121

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