Malicious PDF — malware analysis report

Static analysis result for SHA-256 45d951efeb83d4a4…

MALICIOUS

PDF

86.1 KB Created: 2021-07-03 01:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b058132879b737426f3b2343fff13414 SHA-1: 9b5eac0050654902c275d7b4a3a4419bf74f1455 SHA-256: 45d951efeb83d4a4e2c0640059b47104bf38f1f956c57540152f53ef79d86d0c
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1553.004 Security Software Bypass

The PDF contains embedded JavaScript and a heuristic firing indicates a security bypass instruction, suggesting it prompts the user to disable antivirus. This is a common tactic for malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload from one of the numerous embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8b594b224666d2dc8c6272331a251ea5/wovelini.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16084841bdaf84---50598787584.pdf
    • http://houselandia.ru/files/potofurezidogolegepib.pdf
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/a0df68075bad73a44bef6223b728e53f/25951012277.pdf
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/sibisepegujiju.pdf
    • https://yildizwebpaket.com/calisma2/files/uploads/11340561285.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/32613978276.pdf
    • http://csc021.com/userfiles/file/20210625073748_jopjdi.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/b3e315u4gutkcjoi1gkoijjh0g/melarowenewiwo.pdf
    • http://ahkjt.com/upfile/file/kokusodenanotenemem.pdf
    • https://bleikss.com/userfiles/file/73268670503.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/aca9ed847092c2a7992e4c64223f7d91/67612795944.pdf
    • http://remont-elektro.eu/archiv/file/zamepubade.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160790ef5e5e2a---dovomixe.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69e7f1cc29---96562775424.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8567609b6---pivesez.pdf
    • https://memoservicesrl.it/file/meriraxizixezurafeme.pdf
    • https://artbynela.com/uploads/file/62607626656.pdf
    • https://soyana.de/js/ckfinder/userfiles/files/dotegasotupulaxanow.pdf
    • https://alakharia.com/public_html/userfiles/file/jeloduda.pdf
    • http://bassbasement.org/userfiles/file/wejuzajusasinexano.pdf
    • http://mn-print.ru/ckfinder/userfiles/files/59518882049.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/bqk116sag2lalcpaoqk5mnni4l/metaretofofifowapesewamiv.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945689af9a3---70581264585.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=personal+goal+sheet+army
    • 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://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_off0000eeef.bin
dbb92fc57e72c8f90f5f3f8eb0be3908b569d69be85a9e05641f8238ffe97f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 10576 bytes
font_01_sfnt_off000106fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106FA 16792 bytes
font_02_sfnt_off00011f0c.bin
26b36bc90bff233fe4d87a53a4f4bf3732ab126e8c061ae7bcfc91e1b84f80f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0C 17072 bytes

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