Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bc67e3d30b4a19…

MALICIOUS

PDF

91.1 KB Created: 2021-03-21 01:06:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ee2d5f62ce5231cde4b4e18fd1dc01 SHA-1: 996b797ad1a84c15b771be7feddc42602a1efdda SHA-256: f5bc67e3d30b4a193c0268f9c4b67e5e1e95d56a3f8f77afb687fdd8ada68e54
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The file is a PDF that contains numerous links to external websites, many of which are identified as part of a link farm or redirect to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users to potentially harmful sites. The ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9592

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=professional+selling+skills+pdf
    • https://dojoxokixen.weebly.com/uploads/1/3/4/8/134878929/didalowiziwumulaka.pdf
    • https://static.s123-cdn-static.com/uploads/4486775/normal_5ffe79a5c0b92.pdf
    • https://jidakizunulub.weebly.com/uploads/1/3/1/3/131381167/2865268.pdf
    • https://sedawuxel.weebly.com/uploads/1/3/5/3/135326539/0d0b3eed2d568.pdf
    • https://zejafopo.weebly.com/uploads/1/3/4/5/134505046/8200490.pdf
    • https://cdn-cms.f-static.net/uploads/4372100/normal_6041942324967.pdf
    • https://cdn-cms.f-static.net/uploads/4417119/normal_602685f5378ee.pdf
    • https://cdn-cms.f-static.net/uploads/4449622/normal_6011b77490b88.pdf
    • https://cdn-cms.f-static.net/uploads/4416327/normal_5fe87ba73c089.pdf
    • https://sebupemisopuba.weebly.com/uploads/1/3/4/7/134706320/f0eecd7f3bf8ae7.pdf
    • https://kotimujisozun.weebly.com/uploads/1/3/4/8/134880640/be2ea90895033da.pdf
    • https://dapadode.weebly.com/uploads/1/3/4/6/134646205/bonasipetudida-vejigatelile.pdf
    • https://vosuzupitozom.weebly.com/uploads/1/3/5/3/135313705/9429444.pdf
    • https://bafuselowazela.weebly.com/uploads/1/3/5/3/135318440/175f50f003d21.pdf
    • https://6cda4dd4-8aac-43e7-8003-7c0eea9f7907.filesusr.com/ugd/34e26e_dc60e707d6564863a62f870ab3d84de0.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_5261f0c882fe402da31b95fb126eba65.pdf?index=true
    • https://91953a53-6f32-4f2a-9b2e-0f954541ff31.filesusr.com/ugd/dad90e_4f6de3b20d6a46d6b74fd47d08759c29.pdf?index=true
    • https://s3.amazonaws.com/retobifulipo/96322417176.pdf
    • https://47ab6ce1-aee6-4086-a8e7-31fe393d2411.filesusr.com/ugd/afbef4_9ac23754fb254df7b84f2d4ad034e9cc.pdf?index=true

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