Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8edad7220b25122…

MALICIOUS

PDF

72.5 KB Created: 2021-04-08 03:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b618ee79c6ab03a7e07cd6a1f43248f SHA-1: 28bed401d477e5866973d56845d1d78e844a3aa4 SHA-256: f8edad7220b251229db58c333be14357ed5d43e2a0faefe49a00210555e00f5a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains heuristics indicating a lure to execute commands via the clipboard, suggesting an attempt to trick the user into running a malicious payload. The embedded URL likely points to a secondary stage or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://seumenha.ru/strik?utm_term=git+bash+script+example+windows
    • http://tufodudem.mypressonline.com/neonatal_neurological_examination.pdf
    • http://letaraluzim.scienceontheweb.net/fabazubep.pdf
    • http://ladebizelase.scienceontheweb.net/nursing_behavioral_interview_questions_and_answers.pdf
    • https://sasadonosixez.weebly.com/uploads/1/3/5/3/135332683/7091318.pdf
    • http://varietystore.website/wasunevugawovefawe56vdr.pdf
    • https://nikotegonekis.weebly.com/uploads/1/3/4/6/134628666/a373383df1a.pdf
    • http://raftgjgr.space/beetalk_apkpure_2._3._68k0gi.pdf
    • http://geniusenglish.space/chemfiesta_significant_figures_worksheet_answersyv0pv.pdf
    • http://jafinipu.scienceontheweb.net/42594218479.pdf
    • https://zowisedaro.weebly.com/uploads/1/3/4/3/134355737/vuremil.pdf
    • https://putesoborufo.weebly.com/uploads/1/3/0/8/130814126/kolamaxup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c0e96a72-ec86-4a10-88a1-8e48e4dad12a/63508624773.pdf
    • https://s3.amazonaws.com/rujimidujek/41654009763.pdf
    • https://s3.amazonaws.com/tokatefozude/gezurepawetonutewitifamo.pdf
    • https://uploads.strikinglycdn.com/files/3ef64cf6-09f7-4931-a933-356a7503b789/inverted_conditionals_exercises_with_answers.pdf
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_7c5c2602f0cc41d58fb73ecfd044af25.pdf?index=true
    • https://s3.amazonaws.com/widofafane/13560884287.pdf
    • https://d8acad56-eb9a-42d1-a06c-a695c5b02328.filesusr.com/ugd/0ad6c7_6778d41f0048473b8a3685b6de614d31.pdf?index=true
    • https://s3.amazonaws.com/veledabejufi/dolojazipomolubokid.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/63584827234.pdf
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_749a8300ceb44486bab27dd61203d9ee.pdf?index=true
    • http://kavuduvolilazod.myartsonline.com/electrophilic_catalysis.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_off0000dbfd.bin
81ab7794a78b46fc6160f313bc965b07c4867bff19595f008296159bdc1f432b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 5644 bytes
font_01_sfnt_off0000ef18.bin
59411494dd1c3a25405bc6c38e71e58f2f1c3b20e0d8321edb5f7d0fda99146f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF18 11160 bytes

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