Malicious PDF — malware analysis report

Static analysis result for SHA-256 02db30ecd06c35d6…

MALICIOUS

PDF

79.1 KB Created: 2021-09-13 16:35:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e6412b735dedbc06357561eae25bc349 SHA-1: 319fe82dfc6883c874ee6be4e834467ff0e9dd93 SHA-256: 02db30ecd06c35d6b5605c1a72f26484ebb9f4893686acf293936b7d44da6745
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features a link farm with numerous URLs, many of which are hosted on disposable domains, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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 http://almar-bus.pl/userfiles/file/nepolibamipejokuxukuduxis.pdf
    • https://thuaphatlaihanoi.net/uploads/files/jakarejovuzafemi.pdf
    • http://1yunnan.com/ckfinder/userfiles/files/14987855941.pdf
    • http://abwjefferson.com/uploads/files/30214041171.pdf
    • https://olterus.org/contents/files/jazujibevuteridegim.pdf
    • https://signika.pl/Upload/file/jirosufuxinavanixajapojor.pdf
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46809970059.pdf
    • https://perfecthospital.net/FCKeditor/file/52583986379.pdf
    • https://cristalparkhotel.com/ckfinder/userfiles/files/493884321.pdf
    • http://grandioso.asia/editor_upload_image/file/78206063135.pdf
    • http://regimhotelierbucuresti.com/images/userfiles/31311332860.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d919f0940---xudaj.pdf
    • http://mpti.ru/userfiles/file/11174652.pdf
    • http://hungthanhauto.com/luutru/files/70397353066.pdf
    • http://epoch-making.jp/js/upload/files/34565413095.pdf
    • http://metrominicabs.com/survey/userfiles/files/68801100452.pdf
    • https://testpensija.bankai.lv/ckfinder/userfiles/files/2443746356.pdf
    • http://thepducphat.com/upload/files/misid.pdf
    • http://yey.uw52.com/upload/files/41441562682.pdf
    • http://adance0112.com/upfile/editor/file/61484069571.pdf
    • https://jamisonfurnace.ca/userfiles/files/73963636592.pdf
    • http://studiotecnicopetrillo.eu/userfiles/files/selujogifigesor.pdf
    • http://devitohomesorlando.com/userfiles/files/jipotewefolowodanegag.pdf
    • http://bifruit.mk/ckfinder/userfiles/files/giximagigivagekomo.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e405c4496b---lonefekovozojolaso.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=download+android+studio+32+bit+for+windows+7
    • 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_off0000d0c3.bin
1d7b3877f7059dee21f0b334960f5b3b31e68a84eb2e39d09c99227b3194fbe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C3 10884 bytes
font_01_sfnt_off0000ea35.bin
006de4f17ca61c62270e59e9dadd73eedfbd17a2d5794771d9d16ebbe73350b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA35 17172 bytes
font_02_sfnt_off00011641.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11641 16792 bytes

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