Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd9628978601ef0…

MALICIOUS

PDF

80.5 KB Created: 2021-01-06 04:46:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 92485b003993547be4d794a53ff00844 SHA-1: eed9d7afb54cc88f1606e3c1fd08696ffeb48546 SHA-256: 7dd9628978601ef057d237f64beb67b8aea716aa0c5d62bf58fef1dc08389c42
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, with one pointing to 'traffset.ru', suggesting a link farm or redirection scheme. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into downloading or accessing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/wb?keyword=rock%20pop%20artists%20a-%20z PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404497/normal_5f9f40bf68ddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8a7063ea7a0.pdfIn PDF document text
    • https://wevozunivutuk.weebly.com/uploads/1/3/1/4/131484467/delafanotarosudemume.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/muxozuvalubi/reference_contact_sheet_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/bioscopewala_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/alleyne_s_academy_sixth_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d246c766-c028-473f-816c-1f67d4927d19/zudorisuda.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/77400404033.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/muvizarududijifadoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d39a5c-f3b5-4dff-9fe0-b0e08e2f0a28/the_intelligent_asset_allocator_down.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_off0000ffaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAF 5048 bytes
SHA-256: 31f9320084085793cba1e55e8c55ac82a974ebd8e71a6fb552203fdb67b96380
font_01_sfnt_off00011102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11102 10612 bytes
SHA-256: 2ce8353d306526287ea00c4dfa1a16980ce92702081e8cc5676f57c51365c1ee

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