Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5aea6ccc546575…

MALICIOUS

PDF

77.5 KB Created: 2021-01-08 10:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cf6966bae5f701c77606a82a813f9f0a SHA-1: 15380ed35cefef9483bc9acf935e412cea24a7c2 SHA-256: 9e5aea6ccc5465753d679074db84c6be2795cae6514c232b9d83f5a99345a744
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing attempt. The embedded text, though heavily obfuscated, suggests a lure related to a "Mii maker wii u rom". The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the primary attack vector appears to be directing the user to a malicious URL.

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/123?utm_term=mii+maker+wii+u+rom In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375075/normal_5f9b7cc951297.pdfIn PDF document text
    • https://cdn.sqhk.co/rarirawibowo/gVYrgiI/radio_italia_anni_60_playlist.pdfIn PDF document text
    • https://cdn.sqhk.co/joxesinejag/WKgizij/76856637044.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369629/normal_5fa47d3e850a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414175/normal_5fad9a4256fd9.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/jafibWo/38209479470.pdfIn PDF document text
    • https://cdn.sqhk.co/rokunufoleti/bK1gjaq/23077314041.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/nagixagepere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d6e2377-ff07-405c-9291-f943c15037da/onn_wireless_mouse_driver_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aeb5703-c29d-448b-b39b-034c32b5171d/4414284582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/697b8917-da7e-4d2d-a886-52781eabf8a5/49364804137.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04530398-55f2-4eb9-970e-12e8e9af514d/kujupu.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_off0000f4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FA 4780 bytes
SHA-256: 06437687040dd83f5f72581bc3fd07533dc3562bfb9be8282943f04d4dbdec7c
font_01_sfnt_off0001053e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053E 10668 bytes
SHA-256: 256514d275bb05f35d8aefd18f44ceec5691a6a7fd5f86939e45ee75cb117960

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