Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0fc3f63d1d7c64e…

MALICIOUS

PDF

78.0 KB Created: 2020-11-13 04:36:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2f117e8542aa2c928d676bfa79df2d5 SHA-1: 1e22496b23b686fb1bc4c73590e28bd37f5bc260 SHA-256: c0fc3f63d1d7c64efe8c6dd1895f8ed23a48ffe47f13fefba631b2abe5f2e996
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, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or a second-stage payload.

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://gettraff.ru/aws?utm_term=anemometer+information+and+pictures
    • https://cdn-cms.f-static.net/uploads/4383586/normal_5f9a6cad6bc14.pdf
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f8cad7f8f5ea.pdf
    • https://cdn-cms.f-static.net/uploads/4458631/normal_5fa84a5d61eda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d841eac4-e54f-4a84-8bfe-f24443af96d0/sejuxofalojinipoxe.pdf
    • https://s3.amazonaws.com/votubukaxogilix/kewipititikotivogusuze.pdf
    • https://s3.amazonaws.com/tokatefozude/syphilis_curable_yahoo_answers.pdf
    • https://uploads.strikinglycdn.com/files/1b9386d4-27d1-41c8-a11a-d1d04ba84664/lanepowage.pdf
    • https://uploads.strikinglycdn.com/files/c067cd35-e9d6-4e1d-9154-3b2fe5503d3f/22772224939.pdf
    • https://s3.amazonaws.com/sugaguxagu/unblocked_games_for_presents.pdf
    • https://uploads.strikinglycdn.com/files/421e29b3-64dd-4afc-9901-a10cfdd04e63/install_failed_invalid_apk_persistent_apps_are_not_updateable.pdf
    • https://uploads.strikinglycdn.com/files/103706ab-12fb-4f2a-919f-47220154329f/tonawu.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_off0000f3e1.bin
58218d4e6e15798cf98e57319fd7b9240948ba944a1afb7f07ad3a6696da364f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 5260 bytes
font_01_sfnt_off000105ac.bin
25a503005132014ce057bbd5b3d4bd528c4410afc97d38b5b77e03a676997e42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105AC 10948 bytes

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