Malicious PDF — malware analysis report

Static analysis result for SHA-256 014e4c7b02ff3c0c…

MALICIOUS

PDF

79.6 KB Created: 2020-12-25 07:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13d8bff7238c9facb0f49826725eaef7 SHA-1: 75b939f1da043b1f921ca55dd9245412272f2ac1 SHA-256: 014e4c7b02ff3c0cc4237e1915d77b6e265292810d574d48c0fb1b46faf71f0f
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, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. The embedded URL is likely intended to lead the user to a malicious site, potentially for credential harvesting or further malware deployment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=alto%2527+s+adventure+unblocked
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f8bf8ea73866.pdf
    • https://cdn-cms.f-static.net/uploads/4470968/normal_5fb33cf16a11b.pdf
    • https://cdn-cms.f-static.net/uploads/4375088/normal_5fbdbd97c18dc.pdf
    • https://cdn.sqhk.co/fakupavod/9idAhbA/7_wonders_of_the_world_list_old.pdf
    • https://cdn.sqhk.co/xowuzaseku/RZkRuBH/latadoduzobavarapajebe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/32bec595-dca7-4350-a0e1-0311a2fec59a/55583403010.pdf
    • https://s3.amazonaws.com/kavalukato/hp_top_of_the_rack_switch.pdf
    • https://s3.amazonaws.com/fogibi/ziteduwoxedopese.pdf
    • https://uploads.strikinglycdn.com/files/71eee9b1-55b8-49db-8645-324a0dc125f9/kesidivubopegevagelavawu.pdf
    • https://uploads.strikinglycdn.com/files/f71386e8-4699-47af-a386-38ca9d341aa1/davey_tree_expert_company_address.pdf
    • https://s3.amazonaws.com/povodijirig/wuvomejaxixaxexegapokor.pdf
    • https://uploads.strikinglycdn.com/files/1e7bb36f-6c34-4570-b969-a3ca7ab33926/at_te_walker_toy.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_off0000fa18.bin
c19951cbc1ac987a1f259e7c0bae8e0b09d982d00ca1a1325baad15ba03cfbe5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA18 5220 bytes
font_01_sfnt_off00010bf6.bin
d6b6ccd388aabcd768182821fd117022cc1192a145bc98839dce063c01f08c92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF6 11140 bytes

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