Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ce5220a2cadf9d…

MALICIOUS

PDF

80.3 KB Created: 2021-03-10 04:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 995cb7af0985e39eab110875fd9dc0a9 SHA-1: e3a2002e9ac1747a8d9750b54f3e0491366807b1 SHA-256: 29ce5220a2cadf9df3b1ec8427381526547f7c7d1d56fc75e0c2cad1f8743ea4
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM'. One prominent URL, 'https://kuzutuzo.ru/award?keyword=kiran+banking+awareness+book+pdf', suggests a lure related to banking information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kuzutuzo.ru/award?keyword=kiran+banking+awareness+book+pdf
    • https://static.s123-cdn-static.com/uploads/4502833/normal_5fc9788cb24f4.pdf
    • https://lofusomibebez.weebly.com/uploads/1/3/2/7/132740423/8218433.pdf
    • https://static.s123-cdn-static.com/uploads/4446400/normal_6002972752ae2.pdf
    • https://static.s123-cdn-static.com/uploads/4424007/normal_5fcc1c10d22d5.pdf
    • https://cdn-cms.f-static.net/uploads/4386365/normal_602c6e2679aa0.pdf
    • https://cdn-cms.f-static.net/uploads/4471985/normal_60177243b6818.pdf
    • https://static.s123-cdn-static.com/uploads/4483864/normal_5feb9a3684cb6.pdf
    • https://cdn-cms.f-static.net/uploads/4457857/normal_60309b3f7fda5.pdf
    • https://vowevabejera.weebly.com/uploads/1/3/0/7/130775986/nimugetagaxife_dupuxomuka.pdf
    • https://cdn-cms.f-static.net/uploads/4426075/normal_601d1314da0af.pdf
    • https://static.s123-cdn-static.com/uploads/4465264/normal_5ff002c09a324.pdf
    • https://static.s123-cdn-static.com/uploads/4426960/normal_5fc6849810bc9.pdf
    • https://putuxukive.weebly.com/uploads/1/3/1/3/131379249/7439887.pdf
    • https://static.s123-cdn-static.com/uploads/4473632/normal_5fcac8eaea070.pdf
    • https://static.s123-cdn-static.com/uploads/4375353/normal_5ff7f0604566f.pdf
    • https://cdn-cms.f-static.net/uploads/4382420/normal_6032dc5eb779d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_266ab3c1004a47b99b1ffc0b669abf88.pdf?index=true
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_8da4bd51de8d407cb3c5b076133aac40.pdf?index=true
    • https://52e7b0fa-0041-4536-a49e-9c44ef68b7f3.filesusr.com/ugd/3835dd_cd0cd1969b7d40319a488b6da14a2edd.pdf?index=true
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_eb96b064235d457c9f92c0fad2343d2c.pdf?index=true
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_eaccb0e695c74d0eb94e51a46331ebf7.pdf?index=true
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_960c38ab26a2447aa22f44f18221e234.pdf?index=true
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_37762265c63b43d4a9a5ca5f58910c9b.pdf?index=true
    • https://a79fbd7c-12a6-44fe-9d3c-43dc2b0795a8.filesusr.com/ugd/f95141_779e4da613f24b2787aa9ca510910421.pdf?index=true
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_37421faa26aa4250a204060954820058.pdf?index=true
    • 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_off0000fcf8.bin
382fe8efb49f50ac1986ff1414cd664660b1e0c4e67ab878b0152672ba91dcd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF8 5444 bytes
font_01_sfnt_off00010f98.bin
0830d302fbb49acab1fae54e223076b173f9df0be19eabb9ab9ce61da68df742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F98 10448 bytes

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