Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2af4ea64d4dc5b7…

MALICIOUS

PDF

79.4 KB Created: 2021-09-16 08:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c4648578624cad131a53ded044a642f1 SHA-1: 8b72c7b3385950c9c89d93e4717ecde399efc42c SHA-256: e2af4ea64d4dc5b782d577077ffff43d2aa3ea5756c097cb67d7e8b4f4e599ab
166 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs the user to copy and paste content into a shell, a common tactic for executing malicious commands. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to lure the user into executing a secondary payload, likely via PowerShell or cmd.exe.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141e7380c34a---89358059105.pdf In PDF document text
    • http://ibrahimabuomira.com/ckeditor/ckfinder/userfiles/files/tiranorokokikireda.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/bogurovebepatimin.pdfIn PDF document text
    • https://yellowstonewildlife.com/35385075313.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/mebopurawugoke.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/658682243.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/6738726461401d901fcdd.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/87866472578.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/66922832420.pdfIn PDF document text
    • https://novitas.ro/files/ladadatepizokakaxopofanar.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/jabidatoditedufugeke.pdfIn PDF document text
    • http://biswasi.com/userfiles/files/bivijuwudevatujev.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/82612028000.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/norefev.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-6/20210906125225779664.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/98380024153.pdfIn PDF document text
    • https://ecpa.fr/uploaded/file/50572111857.pdfIn PDF document text
    • http://coolbiotech.com/upload/files/68405263557.pdfIn PDF document text
    • http://dungcucaytrong.com/images/files/lesuwarogujotizesipi.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/66441936253.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/mexewawixapitemepubef.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/97067639522.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/nabululagobavujemiberas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=windows+slic+loaderPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e75c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75C 18872 bytes
SHA-256: 0c80127216a62c19264ce21970144090bde8e559c929b956e43796b5b738b58a
font_02_sfnt_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 10344 bytes
SHA-256: f2c2c3315bd659bfcaf9599280fcd71dee9a2eb77f50a1d4d6ff75685e24dcfa

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