Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5339cf417a8888c…

MALICIOUS

PDF

70.5 KB Created: 2020-12-18 03:17:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac71c09665363fe5addbceeae872a7fc SHA-1: 11e6245b6d92890d1d0b442c7400adaf1ebab063 SHA-256: c5339cf417a8888c6fe51833714eaa256349238e4c5cf3b8ae2218f63d04f860
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The embedded URL `https://cctraff.ru/123?utm_term=carmike+oakwood+mall` is flagged as malicious. While no scripts were explicitly extracted, the PDF structure and the malicious link suggest an attempt to trick the user into visiting a harmful site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=carmike+oakwood+mall
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/4217272.pdf
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5fae4e7745e64.pdf
    • https://cdn-cms.f-static.net/uploads/4369143/normal_5f9e823bdc5ca.pdf
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fcad746b302f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/91ca3740-ac86-4b61-887f-534cd57de90e/manual_dryer_electrolux.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2205147b14804f7fd81/1606283810895/chess_knight_moves.pdf
    • https://s3.amazonaws.com/roxawo/free_guided_meditation_script_for_healing.pdf
    • https://uploads.strikinglycdn.com/files/8dfe8191-e841-4e1d-88b1-1de1c59fcb65/past_perfect_past_simple_exercise_pd.pdf
    • https://static1.squarespace.com/static/5fc56aeda5bc066edfc3e318/t/5fcd625c7ae85b53b2a44ed6/1607295581072/14831658003.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_off0000d95e.bin
d7c5a80ac3ad118354d62bc27820cfeaae76de3680d376fa74ed272169b6bd77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 4856 bytes
font_01_sfnt_off0000e9da.bin
f5ed760c32eee9a801e576af38638a4e1c9193ee845e4ff684fcca86aa39238e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DA 10516 bytes

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