Malicious PDF — malware analysis report

Static analysis result for SHA-256 569390e24e7c8dd2…

MALICIOUS

PDF

71.6 KB Created: 2020-11-18 10:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02405207f216edd57e9ac3c26b8342ed SHA-1: d64326b58b0e2897124f95a61188b8a3d641a316 SHA-256: 569390e24e7c8dd256a12a0f99eca3d83211db9b9f7a7e372c4d2a9c2240f37c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary IOC is the malicious URL identified by this heuristic. The ML classifier also strongly flagged this PDF as malicious, supporting its classification as a phishing or malware distribution lure.

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-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=24+month+lease
    • https://cdn-cms.f-static.net/uploads/4446491/normal_5fb4c4a5094df.pdf
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5f925dbebf9ad.pdf
    • https://cdn-cms.f-static.net/uploads/4458394/normal_5fa83c0eb492a.pdf
    • https://cdn-cms.f-static.net/uploads/4447431/normal_5fad949da57d9.pdf
    • https://cdn-cms.f-static.net/uploads/4422373/normal_5fad2411aacd5.pdf
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5f9d61feaffeb.pdf
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5fa6ed7978f49.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/99a20cd1-d4b1-4256-b70f-9c92a88b6e1c/civil_engineering_quantity_calculation_formulas.pdf
    • https://uploads.strikinglycdn.com/files/2fa77484-cf4d-4208-9423-342962948ce8/degapoxofuronuxalefag.pdf
    • https://uploads.strikinglycdn.com/files/e4f85599-ce77-4da9-80b4-61f024c041f2/cradle_to_cradle.pdf
    • https://uploads.strikinglycdn.com/files/04c135b4-f70a-44a5-8345-2f5cbc713ba8/43948362645.pdf
    • https://uploads.strikinglycdn.com/files/75365f5f-1e79-487d-b775-327077209eda/7973075134.pdf
    • https://uploads.strikinglycdn.com/files/72534443-f68c-4257-9e97-cde359a8a5c5/cars_that_start_with_letter_j.pdf
    • https://uploads.strikinglycdn.com/files/0ba4b3cb-8515-4fc3-828b-2506e712ce36/89919958040.pdf
    • https://uploads.strikinglycdn.com/files/98be632d-e5fe-49fe-b60f-545e18a5d11b/chingliu_fl_studio.pdf
    • https://s3.amazonaws.com/dusubonifu/racing_rivals_hack_mod_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/37abf9a0-125d-45db-ada5-bcdfae2ee83d/jitaxamevebop.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_off0000dd59.bin
06bb959bdec4139ff857e3b9e399d671a4409f06e35f36692464eec802e02faa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 4956 bytes
font_01_sfnt_off0000ee0f.bin
b2a3feed8a2c47374da55b7d67e36d12e9b37f9f296da669e5eb551d22aeaabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 10392 bytes

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