Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9b967a16baf0a8…

MALICIOUS

PDF

65.4 KB Created: 2021-03-27 22:33:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aaa949dc6b0484af471a221b9fec9c9c SHA-1: ef27aebe1cd3bc45258cb8aab4ec6712c5749bad SHA-256: 0f9b967a16baf0a853f3e5fc0c25080f3fd2df5f74ed0754b9546387534f791c
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The ClamAV detection and ML classifier further indicate malicious intent. The embedded URLs suggest a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5221

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.
  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/award?keyword=les+4+accords+tolt%25C3%25A8ques+anglais+pdf
    • https://cdn-cms.f-static.net/uploads/4485016/normal_600b7c6ea8426.pdf
    • https://cdn-cms.f-static.net/uploads/4504047/normal_603392093d1d7.pdf
    • http://wspring.space/algebra_2_trigonometry_review_worksheet1bosk.pdf
    • https://cdn-cms.f-static.net/uploads/4470232/normal_6037b76194290.pdf
    • https://cdn-cms.f-static.net/uploads/4376621/normal_601f869a12888.pdf
    • https://cdn-cms.f-static.net/uploads/4374175/normal_604cee06bd5ca.pdf
    • https://cdn-cms.f-static.net/uploads/4416927/normal_60317f85db51a.pdf
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5fd9d5eca4ffc.pdf
    • http://lumacy.site/zogerumkfwc.pdf
    • https://cdn-cms.f-static.net/uploads/4446921/normal_6011756dae135.pdf
    • https://cdn-cms.f-static.net/uploads/4474478/normal_5feaf2df7c8c1.pdf
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5ffeb6a96064c.pdf
    • http://tasigezagu.scienceontheweb.net/vuxazetuxakoxa.pdf
    • https://static.s123-cdn-static.com/uploads/4446638/normal_5ffe82cbd6ac5.pdf
    • https://static.s123-cdn-static.com/uploads/4474470/normal_5fe331fe46ff2.pdf
    • https://static.s123-cdn-static.com/uploads/4475734/normal_5ff8da266581c.pdf
    • https://cdn-cms.f-static.net/uploads/4494677/normal_603bb826cb493.pdf
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_9c9438b683434b8bb751ab4d9db6f315.pdf?index=true
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_7205612ff33d434e8956c19cac7ce3a2.pdf?index=true
    • http://kaxuwenewutexu.myartsonline.com/baseball_video_games_2020_pc.pdf
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_e5665a025fe74696a625e2dcbe5b727f.pdf?index=true
    • https://2e9d2e4a-15d5-4529-8b29-235aceea4e08.filesusr.com/ugd/cac96f_2faec1fa542f465f84a2428849eba8b2.pdf?index=true
    • https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_910be6768b1a4081bebbb63c46447acc.pdf?index=true

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