Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1fa008c57e4032…

MALICIOUS

PDF

94.5 KB Created: 2021-07-02 11:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 248921d07c90bb5e234c2401cbe57a8e SHA-1: 30b71de70771778558e031cea636984939ea5b37 SHA-256: 4f1fa008c57e4032a49b3be96ce116a66891d1d2922e56d8d380cf43744b7da1
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which point to suspicious PDF files, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of external URIs and the overall detection indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 4

  • 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 http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/1490098414.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c85f6fb37f3---riwefowuwobelimowa.pdf
    • http://songiadahoaian.com/upload/ck/files/poforerow.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/be2b401df007ef6476d491eb841abee2/jonejowugaguniwavobagijik.pdf
    • http://photou.cc//ckfinder/userfiles/files/87825723608.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/98546867149.pdf
    • https://aawyx.com/sites/default/imageuser/file/xovuniwunugefipemuzo.pdf
    • http://canxetaianhduc.com/images/file/gomarazojazojo.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa9860bdc9---linegesikazebapenav.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/iki4u6lvncl59j25iet0mkk9pj/52124519483.pdf
    • http://drapikowski.pl/uploaded/fck_files/file/64387702959.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/ca7358301d1719e7c8cc27ba88c5eefb/gurujafunuvugolijutimogek.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/28d83b6274f06190bc9dba5369726517/pofexu.pdf
    • https://ewdel.cz/ckfinder/userfiles/files/pifegalosireb.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/2a2d430116568dd060256f588e4b1578/suletozekak.pdf
    • http://luingpyrex.cz/foto/Image/file/fikanilulirijakulugi.pdf
    • http://envigest.cz/upload/file/22161065676.pdf
    • http://ekolojikweb.net/upld/userfiles/file/baruxekojorakorojaxer.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/86207693d75de2bafb4e908c63b835ca/pomebijonofimuwuxizalonam.pdf
    • http://koryosushi.com/uploads/files/rikeguwuwebimegirukami.pdf
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/wuvelewozaxafuxaxi.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfe8bd2de---63951547231.pdf
    • http://okwecare.com/usr/userfiles/files/komoxexunaside.pdf
    • http://jnnycc.org/userfiles/file/38633049241.pdf
    • http://lacasedescaraibes.fr/file/42987707131.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b622d016a65---xiteju.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=scones+made+with+bisquick
    • 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_off000109c6.bin
5829709e0f6b8dee2ff171d3f2ea6eaa8ad6450a3fcc57da1bee133f1e802ffd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C6 11128 bytes
font_01_sfnt_off00012365.bin
cfe388f39c2a2203d6f79c077841e7f77db97b7aa166a8d79e747b75a4e0399d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12365 18712 bytes
font_02_sfnt_off000154c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154C5 16792 bytes

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