Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f652f212b815f34…

MALICIOUS

PDF

77.5 KB Created: 2021-01-03 14:01:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a1a9bd053ccc6371cb4065aad290be03 SHA-1: 7455c917d713ba57bde6a13c88814091d0a13e64 SHA-256: 6f652f212b815f34bd3017e0c2096d360a0c61c68d6c6a6c0f45e3fca4018893
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URL pointing to 'trafftec.ru', which is likely intended to host malicious content or a phishing page. The document body, though heavily obfuscated, contains text related to 'Iowa valley high school enrollment', suggesting a targeted lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=iowa+valley+high+school+enrollment PDF link annotation
    • https://cdn.sqhk.co/rilixuzewiv/n4EiaPu/dining_near_me_seafood.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502819/normal_5fe78550dbc4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377377/normal_5fcf0136e89af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f8e94dccfdb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fde5be10a40c.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/leributafa/60082158871.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/97757179178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb72034-af9a-4243-abbb-c248ac4b793d/probability_problem_and_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/726f241f-98a8-4f0b-b65b-9f14f81715f3/19489842291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b919f8-2879-4709-b1d6-fb06d1448d91/vuromeraxujegowovi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac06cd0b-127b-4ec3-9c39-e091d69cd048/nelojaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc79a5e1-0854-4f30-ba28-03497b369f48/33102565855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d2cb08a-b3c1-4a7d-9f01-8af2e1c274e0/xumul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e9e445-0baa-4cca-a299-649079911190/nanoblock_instructions_bunny.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/19587331596.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_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 5404 bytes
SHA-256: e24a111c9f691d647b83349c8bb5f4dddb4b96a44837c1fbbb5ded56253d5137
font_01_sfnt_off0000fffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFC 12528 bytes
SHA-256: 8ec90cf9561eac4b39ca51e882d245c3359e88b2ae7f9a8e4230984c4ae2e8d1

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