Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64fe203eda76ea3…

MALICIOUS

PDF

86.6 KB Created: 2021-04-08 02:10:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b470b2e031df8f2a72619b5d5cc2133 SHA-1: 7b0776b61de7350865f61914745bf587f7f448d3 SHA-256: f64fe203eda76ea3b5c8a8d18c8923ba0d536d1227433bbb2b0d5a618b7f616d
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The presence of a 'download button' heuristic further supports the phishing lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jumiwimov.ru/123?utm_term=all+in+one+seo+pack+wordpress
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fe227499ec78.pdf
    • https://cdn.sqhk.co/zoraxiraga/hefUo6E/8682278473.pdf
    • https://static.s123-cdn-static.com/uploads/4496001/normal_5ffa0b33d13f7.pdf
    • https://subefivu.weebly.com/uploads/1/3/4/6/134688636/7799f3aaad9224b.pdf
    • https://cdn.sqhk.co/jezumasulej/djijjTI/ziwonovozelatojajexe.pdf
    • https://static.s123-cdn-static.com/uploads/4487647/normal_5ff77afe93dd3.pdf
    • http://takinodexitimax.22web.org/wogonefisifeletidimiwo.pdf
    • http://risumeboze.getenjoyment.net/nujarafutav.pdf
    • https://pogefaduvo.weebly.com/uploads/1/3/5/3/135391099/f81edd.pdf
    • http://jipevuzugegusol.22web.org/acronis_backup_for_windows_server_11._5.pdf
    • https://cdn-cms.f-static.net/uploads/4366405/normal_602a750874e34.pdf
    • https://cdn.sqhk.co/segidexu/fJMnfRg/dogifiluwanipegivapeke.pdf
    • https://cdn-cms.f-static.net/uploads/4385038/normal_6056b7849252e.pdf
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/sakebevas_nelavizaden_kosokowu_toburewo.pdf
    • https://nerupeke.weebly.com/uploads/1/3/1/4/131483009/mugunonudafanes.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zapesezowu.rf.gd/chinese_english_dictionary_download.pdf
    • http://zasujofimak.epizy.com/honda_gx160_pressure_washer_manual.pdf
    • https://s3.amazonaws.com/jumedemimo/36923046666.pdf
    • http://lufopudizomuv.atwebpages.com/verbe_anglais_traduit_en_francais.pdf
    • https://s3.amazonaws.com/xupimaral/42642192583.pdf
    • https://s3.amazonaws.com/jiwotarotavuz/japanese_economic_development_theory_and_practice.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe20.bin
7dc71f1eb3f91e3f36334ce5aced3ee573a3288fb75d65e3617560fe9819b852		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE20 5212 bytes
font_01_sfnt_off00010ffc.bin
2fe410279b5c0e7c250450b181fdebdf673f34e1b4fdf20081d6056de49f0d93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFC 11672 bytes
font_02_sfnt_off000137e3.bin
bcfecb9fde4b74e4a2b692e15caf305b2988a1cfe4c6386614002e38d35feb86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137E3 16168 bytes

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