Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c9a2e910fbc0cb…

MALICIOUS

PDF

72.3 KB Created: 2020-12-15 23:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 540320e644cd6bc51fe2e47d2785ffcf SHA-1: 2cab66fe1df1a9c34d6d32fba3199f6c982bc88e SHA-256: 30c9a2e910fbc0cbfc4a92b75c54532169de511ef724085bec7604dd458b7f88
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', likely a phishing site. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious external resource, consistent with spearphishing tactics.

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/strik?utm_term=density+graph+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5fc20e2cc6ff5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446260/normal_5fc85c5e4dabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381962/normal_5fd7c79773c6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412151/normal_5fc610edc115e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5f9a7d894d93d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419410/normal_5fa08cf21d48f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5faf9f2738f99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_5fae213416d9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf6abb7ee8e70759df73f/1606219439604/independent_sales_rep_job_description.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a80a5eb-9820-4f1a-907f-09634e8d6dfd/metal_gear_solid_ringtone_alert.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/gajus.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c273a13a450babf34cb7/t/5fc3b2b2f8cdb769c65423b1/1606660791067/makupeto.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/word_ladder_game_worksheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec376639-58e9-4cd8-b411-3e0af89ff49c/kamen_rider_decade_flash_belt.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_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 5092 bytes
SHA-256: 9c2af6c299af79426f1868ea8f4ba3eaea5f2f2d998ae63b95dd423ca4a59037
font_01_sfnt_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 10376 bytes
SHA-256: fcebf1421d69536762fb3a49309b267be56a36bdc160fc4957e8276ee6377612
font_02_sfnt_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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