Malicious PDF — malware analysis report

Static analysis result for SHA-256 3219cd503c6049a4…

MALICIOUS

PDF

60.2 KB Created: 2020-12-19 20:11:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b90591dd5161272226b33ef8c8d12711 SHA-1: a38f288d00a4d46299b08d1eade57838cf9b2679 SHA-256: 3219cd503c6049a449d193ff7e6ab8822e4a39dedd5da93b784b9e51a6c80942
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'traffking.ru'. This URL is associated with phishing and malware distribution, and the document body, though heavily obfuscated, contains text related to 'Prime video apk file', suggesting a lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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/aws?utm_term=prime+video+apk+file In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/47534002865.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83272474-a25f-4ed5-8a01-ff6618047f9d/vuturixux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3343b2d-07ec-4377-9e5e-9239b0ecbc7a/the_minpins.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/vanunaroramesoxirawat.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbffb332bbd740658015355/t/5fc3b2419b1ed035384ddd65/1606660673829/jezukabupidixuxorilago.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f4078787e879896c419e/t/5fca9d954780a777057c97aa/1607114133708/pinball_space_cadet_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74edd766-c4a6-460d-8dc2-16696a1475e3/dujunodufomituwos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1507d2-c833-4182-a159-dae7a2e3e769/alkane_naming_worksheet_with_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd00d373299f0c543a6efb/1606222036638/gikunulatigesoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc3662de-1b00-4382-b8bc-19cc987a864b/vabunajakijedagepibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67c1050-9acc-40a4-bc68-0f9eb3799892/86161077295.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_off0000b66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66E 5132 bytes
SHA-256: 7e58686c096ff3ef09322a4154f309ccac698f1bd90a3a6c558dac4de08f4100
font_01_sfnt_off0000c7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7DA 8480 bytes
SHA-256: 08a1975fc0ca94d58cc93262377c58542091f711f2eab7078737257c28a001a7

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