Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f28c0ad730e6d13…

MALICIOUS

PDF

68.8 KB Created: 2020-11-09 17:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ecf946c3b38f233d2002f6d4f432394 SHA-1: b1ed5dbf87d07b810eec610cb6ac6938d6b23d03 SHA-256: 1f28c0ad730e6d13605571e9105ffc63a46fa640cc8172f7d525ecb1218f3937
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary links points to 'https://traffking.ru/aws?keyword=senior+shirt+designs+2019', suggesting a potential phishing or SEO manipulation attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/aws?keyword=senior+shirt+designs+2019
    • https://bidutujube.weebly.com/uploads/1/3/4/4/134403342/d7e67921e.pdf
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aead3c03-b1b8-46e0-8212-02bc0bf79423/62831370589.pdf
    • https://s3.amazonaws.com/xeroguru/sedona_method_summary.pdf
    • https://s3.amazonaws.com/henghuili-files2/medieval_period_of_english_literature.pdf
    • https://uploads.strikinglycdn.com/files/60641ed7-54e1-4264-8528-3a9b37a4f6ed/74635750377.pdf
    • https://s3.amazonaws.com/jamokaroxoj/how_to_find_oblique_asymptotes.pdf
    • https://s3.amazonaws.com/towakog/personal_statement_for_scholarship_500_words.pdf
    • https://uploads.strikinglycdn.com/files/bdf4d6d4-f603-495d-bd70-6226999bf093/72861721424.pdf
    • https://s3.amazonaws.com/zaxuledo/zoninaxosu.pdf
    • https://s3.amazonaws.com/muxegeza/archimate_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce89.bin
45a999d545ab57839906ec35808acfe8e7cb601a529209f7fc1acc570d5ea6db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE89 5428 bytes
font_01_sfnt_off0000e0fb.bin
bb43885ffe5759d4ba94b643df5100b3a62754a6873b348089dfc48d981809cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 11204 bytes

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