Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40b2650af7741a5…

MALICIOUS

PDF

70.7 KB Created: 2020-12-06 21:19:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 27f1c36d65dcde3f03e668e0b1a2ce4a SHA-1: 7abcfede919ee81341b18e4bb57b9c96c04eef0e SHA-256: e40b2650af7741a5b6a87624226bc5cf22b225311b2f4e755a19d416a489fa80
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to a suspicious domain, combined with the document body's deceptive content related to 'Assassins creed hoodie jacket', suggests a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself likely contains the malicious link.

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://trafffi.ru/strik?utm_term=assassins+creed+hoodie+jacket PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454545/normal_5fa31bff8b981.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473637/normal_5fcaa13aa5c22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495413/normal_5fba7737aeebe.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/migivewuwe/nibulepaxosaxilebi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c877848ba205d1c3861/t/5fccceede43f2b00a8a63c06/1607257838053/8892686313.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/kilapodevibizaxuduvuriles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98a2610-c03c-405b-9fb4-da9bf22ae980/77879752721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d0a6cea-4bae-41c0-87cf-a03860d1ab47/the_lord_of_the_rings_book_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5de1b7848ba205d3add58/t/5fc8096fd6b05e26527fd862/1606945136569/jozetulewatis.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/26975886515.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/grocery_store_business_plan_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca44ac8b-1d23-420e-a93d-b248bfebe6dd/command_economy_advantages_articles.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/96469991816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84c0398-4d3b-45a4-86fc-9b72fb8b8378/mango_apk_manga.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_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 5124 bytes
SHA-256: aa166df7f5ef508b8d52a3340ee50edccc8a78aff67a9e9ec01c921ac21dac75
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 10116 bytes
SHA-256: f4b136cc227a4fad93133b013eb19720aa0299497beca4a48f5c3fdbe6a92b1f

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