Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fd1604092cb9eb…

MALICIOUS

PDF

62.2 KB Created: 2020-12-01 03:23:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b06f98a1f4cb9f32f68b15e70ad2da09 SHA-1: 7e8345cc0dd08cbe518665354a2ac452afeeae27 SHA-256: d8fd1604092cb9eb07f869c89c599c22b76031fe131888fbf685f63de0857558
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to a 'Challenger hellcat widebody manual for sale', suggesting a phishing or scam lure. The ML classifier and ClamAV detection further confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/aws?utm_term=challenger+hellcat+widebody+manual+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f872f258f45f.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/6d9ddff5-2df6-483e-9b36-1ab786446d54/minatowafatajivegiwox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55821776-0d90-4290-bf58-f7acf69a668a/usmle_genetics_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8426461-af9c-437d-8178-253d48e167f0/3349144009.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a77be9b6939510c7598/t/5fc3cce5173fb5383b178280/1606667494573/dudigilatar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7e2261-5ab4-4b8d-a825-e65636a73620/gexululodogasijorobir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a75573e1-b9e3-4730-9a97-4909fc32f3b5/vafuloxipezurepom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8703892d-4dfa-4b50-84a3-dd29a563b56e/mots_finissant_en_ille.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49f6f2b7-f92f-4e56-bcd2-fb5257b045b3/96631435011.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/80274810879.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e713ba-431c-4356-888e-31ee6368dd27/wurth_wood_group_raleigh.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdb7453f-c3a2-4e95-b148-c6727b73648d/how_to_download_minecraft_comes_aliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0044b14-a1b7-4a5b-80bf-7c8053ebfb6e/arun_sharma_data_interpretation_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2592695a-91b2-422e-a707-e6274ad1692c/47036000949.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1480d27a199023ab7f389/t/5fc346354f98375720493ddd/1606633014379/wilutufosepufiduk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eaa800d-31ca-44c6-b64d-e8fde17dd48e/51656131823.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/will_durant_books.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_off0000b459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB459 5676 bytes
SHA-256: bf44f75fda39d246128361b415b76168d924137dccf17cffed4c9a8a6b9ab801
font_01_sfnt_off0000c78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78C 10832 bytes
SHA-256: 9c56480a1ecfe943ad050b0f0505dc5d22d640d507d3efaa6fdc315afe2c61b4

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