Malicious PDF — malware analysis report

Static analysis result for SHA-256 585d79f5b2cbd3e3…

MALICIOUS

PDF

66.7 KB Created: 2020-11-25 07:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5f7b0714b039f29d50bd3ab97a7251ca SHA-1: 22d7cde4f595e7b86480f5cbe6575aeaab2512fb SHA-256: 585d79f5b2cbd3e36664f9d525272cea498238d900719dee28cac5afd68b196b
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=sony+cdp-cx355+remote'. This URL is likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and the malicious URL suggest an attempt to lure the user into clicking the link, which 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://cctraff.ru/strik?utm_term=sony+cdp-cx355+remote In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5fa33871bc32a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486036/normal_5fba8654b02b1.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/b2270a8d-ff5f-44b8-b80e-5f6ddb6923a2/nawazusujijokiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eb7967e-ed85-471d-9bfd-4d5b0d0e83c8/24951996923.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c880a9-fd12-42d4-9412-9f093bf443f2/computadoras_laptop_apple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d0454f-25b1-4581-89dd-f84307dd80d9/bfb_characters_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6033d8c4-eb06-42b3-9c27-994669b60f8f/lapojutuvulovutaver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc601a1-9599-4c45-b81f-74ae7ec909b6/76065314887.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/250eb4ba-0e01-4d55-8c7d-042dc06b3c87/65765633360.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/inductive_deductive_reasoning_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1ed7b5-1dbf-4efe-828a-c2deb1f2fd7e/caterpillar_cnsp_tester.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eaf11f3-43bc-4585-8b52-b935781dac21/sibigusiwepaliwarixitik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf9860c5-a9b5-4e5b-a1b8-cf12fe505b60/54274516452.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_off0000c7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AE 5392 bytes
SHA-256: 55f750fdb4341b56802aa2ed1b94750aa7e4d291e4a6fee149939e70cd165926
font_01_sfnt_off0000da13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA13 10668 bytes
SHA-256: c581b5500237af807d36cb1a12a569e54f994bf59d3231aca55c458ead162be7

Open this report in the interactive analyzer, or submit your own file for analysis.