Malicious PDF — malware analysis report

Static analysis result for SHA-256 5278c66cf9dda00b…

MALICIOUS

PDF

69.5 KB Created: 2020-11-09 20:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65a8d50d844e37dfdf29339a4be03201 SHA-1: 767fcb26d4a870457240586319216c6e3913a0e7 SHA-256: 5278c66cf9dda00b4d04b379c714a61a48f1ab499f1b4e7d7e937f46b46990ee
214 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, many of which are part of a link farm designed to obscure malicious destinations. One critical heuristic indicates a direct link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Events in la calendar', likely to trick users into clicking the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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?keyword=events+in+la+calendar
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f970b75a75f1.pdf
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f9b2880621fa.pdf
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5fa5ee2c22176.pdf
    • https://cdn-cms.f-static.net/uploads/4419849/normal_5fa46d44d9299.pdf
    • https://cdn-cms.f-static.net/uploads/4426425/normal_5fa16fb3d4c83.pdf
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f89ded3d7ad9.pdf
    • https://xipowabiwakazo.weebly.com/uploads/1/3/4/6/134614187/xevanowivaz-mojafoginijod-bidujafugugum.pdf
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8a8de8db81d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/firigugixujotov/nemirilapobuxi.pdf
    • https://uploads.strikinglycdn.com/files/7d5ece4c-5e7d-414c-b46d-de2a2910a394/mabobiwibusidisetotemal.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_off0000d32a.bin
7f75a984802e32de7fec8332f5d84e8597bbb6104f7cd25c39a57cb446d2bd16
pdf-font-stream PDF embedded font (sfnt) at offset 0xD32A 4948 bytes
font_01_sfnt_off0000e412.bin
c9ca4593b0465895a0a6c88c5725721c00009fc9a2b6b31a79c411656c6005e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xE412 11180 bytes