Malicious PDF — malware analysis report

Static analysis result for SHA-256 40bab09cc4b0d435…

MALICIOUS

PDF

78.4 KB Created: 2020-11-30 13:11:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7b88511098ff05212003c50aa31ce36e SHA-1: 1c9a7d613a87d2524a95e772e2d1ca3384addcab SHA-256: 40bab09cc4b0d4359b7a558cd2b4aeeabaa68d3d868884c323a2a5587265de5f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, 'https://traffine.ru/123?utm_term=instyler+rotating+iron+how+to+use', is the primary indicator of malicious intent, likely leading to a phishing or malware download site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL in a PDF is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/123?utm_term=instyler+rotating+iron+how+to+use In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_5fa727c637bd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388181/normal_5fbc1084a42f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f8d2704f1f30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b7727db-717f-41ab-8b12-608edfd18955/samsung_hw-_km36_review.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/bts_wings_concept_book.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/ligovugivolazujivimajom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53520d2-dbb2-4fe0-a474-4581092fd3c2/gegaremojopipapofumus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24aaea24-b4f5-4610-8364-161180e1364b/12180154960.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/8867193950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ebf34b5-43ba-4754-b971-23ee2514c72d/43457790108.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/phpspreadsheet_csv_encoding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44dd84d3-23d3-46ce-8b10-e9266b24b53a/35405694955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/979bda9e-4e0c-4672-b518-30c79cc7d2ca/zuvujunitokaxuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6387140e-24ab-4dbd-a4e6-4762eef7afe7/razofafilagezeguda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83ca9766-3acd-4623-95e9-3d592fcf2b29/active_directory_certificate_services_linux.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_off0000f3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F6 5080 bytes
SHA-256: 0fea920de34b948e959e751f45257aa08b683557cc593c495fcc90d1f9a18247
font_01_sfnt_off0001054f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054F 10952 bytes
SHA-256: 00f80e37103f22d493455ffa80cac3d669247d6c056c394de39d5f7d4796720c

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