Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9fbf269d7ecdfd9…

MALICIOUS

PDF

63.8 KB Created: 2020-12-19 15:35:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e7e4ce66005c50b6ea543e5341c60abf SHA-1: 80b279e1723ac26d73b0ef930ee3ed46f3f57846 SHA-256: f9fbf269d7ecdfd9186634d05fd106f1b7cc1890ee8c8ea9e1ac203ff62c2663
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with a primary suspicious URL pointing to 'traffnew.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to 'sheet music', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffnew.ru/aws?utm_term=iris+goo+goo+dolls+sheet+music+pdf PDF link annotation
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/dudapurebo.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/moxekibupuru/stock_ticker_board_game_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e19dbda9c57a97be1de8/t/5fc841424b97230d0506965c/1606959429290/21499475475.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/55401909376.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/best_whitening_toothpaste_consumer_reports.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d46cb6-2c74-489b-aa6d-301dd9326a67/solving_recurrence_relations_master_theorem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e96d4562-0a53-43a4-be7a-7651bdc649a0/81859840560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cb6f8a6-a4ed-4317-8c48-b378b67ecce6/soxukojilalatojafod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3b2ed07-d6dd-4818-b9e3-ca1e1652c9d1/37509692045.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/44241841259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee7d522-2016-4a67-a05f-768bb7ea695d/desovugesewevulufawak.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_off0000b9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EE 5296 bytes
SHA-256: 13043e2476a048a454480dcd85ce5ea82ace9c38d1e712af306a14f996669aa6
font_01_sfnt_off0000cbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCD 11512 bytes
SHA-256: 5475042c380c65febd6b280eea2f43bf9194dc9b559ad4ac9a4d709348294549

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