Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2731fed5ffec6b…

MALICIOUS

PDF

73.5 KB Created: 2020-12-18 03:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f3364f772fe19fe3f034f3d32d95cc7 SHA-1: 9e0392b0ae0476838b450d054952e3e600ae0565 SHA-256: dd2731fed5ffec6b2c36c3b0f6a88328dcb5a52f57347523ad9c1de16c0b16b6
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, traffking.ru. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs within a PDF, coupled with the high confidence malicious verdict, suggests it's designed to redirect users to potentially harmful content or initiate further malicious activity.

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://traffking.ru/strik?utm_term=inversely+vs+directly+proportional PDF link annotation
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/pubojofuf.pdfIn PDF document text
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/gugar-zetuxasawep.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/vesefotim_toxopadolifipu.pdfIn PDF document text
    • https://zokagagewawo.weebly.com/uploads/1/3/4/3/134346606/xedotofe_pevagagu_sogum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc6d054d32fb7060d0dc3b9/t/5fc8b284b74dd54858defe71/1606988421417/36178558643.pdfIn PDF document text
    • https://s3.amazonaws.com/vibove/55079423859.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd40802de71506718c4d3b/1606238336667/72436323690.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d4b9e5c7695ca9b4bda1/t/5fcfa7a910aae775717a4e98/1607444393805/should_you_answer_a_toll_free_call.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/new_shooting_games_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec614de3-9e06-44f5-9cbd-3da1117c44b5/the_raven_king_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc514fa24b06a7eb31a6f7f/t/5fd133e5182c2b22a3644409/1607545829885/12709713080.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_off0000c6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FC 5164 bytes
SHA-256: f7849a741d5eed2baea1f34e3c0d07bf7139b1ba88cdd0c41b54f52ac3752522
font_01_sfnt_off0000d8a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A7 12192 bytes
SHA-256: 59ecfaa247fccfbeff455c2a4184935934ee58043f56f7d0c122d3d0bd474f7b
font_02_sfnt_off000102c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C0 16496 bytes
SHA-256: c7875fdcaaf876c2a64a116b9e33b111c7b7a5bb7950b0c0d0a03020d9c00fb0

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