Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a4b30dc185e5bc…

MALICIOUS

PDF

89.5 KB Created: 2021-09-10 06:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 728213812dcc1097a549ec6fa8f66c66 SHA-1: 398b2a32fc8b2ef37f72e51d7c321f26f973a9ee SHA-256: 96a4b30dc185e5bc9178c79f66a865085aab2a9310963a0854c4ccdc74e1e2e0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The heuristic firings indicate it's a link farm on disposable hosting and ClamAV detected it as a phishing trojan. The embedded JavaScript likely attempts to download and execute a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://i-physiology.ru/upload/mexitudiladigazawov.pdf
    • http://nieruchomosciklodzko.pl/files/file/gorusafijejum.pdf
    • https://smobiil.eu/userfiles/files/42639964453.pdf
    • http://aircond.md/upload_fck/file/zegenila.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/5c82c3043775b23c3168b4a66a2a22c8/26702640718.pdf
    • https://kenadong.com/contents/files/mumixabavukaponomidi.pdf
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/15690117202.pdf
    • http://ageddfjtjgrade.pretty-match.com/upload/files/18635654680.pdf
    • http://leaguengn.com/userfiles/file///vijevasedosafevit.pdf
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/960056376.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/2aee6d33192f3240f3f2bb65144421ba/belapamulugenuratujabaw.pdf
    • https://bda.ch/ckfinder/userfiles/files/90193621688.pdf
    • http://jjw-led.com/userfiles/file/48061761695.pdf
    • https://legend-chang.com/UserFiles/files/tosagewa.pdf
    • https://abctranslink.com/ckfinder/userfiles/files/tumilupupofopuzo.pdf
    • http://congtrinhnhaviet.vn/upload/files/vefenoxu.pdf
    • https://familienbilstrup.dk/userfiles/file/kexogarag.pdf
    • https://biomedchita.ru/imeg_master/file/tatino.pdf
    • http://lica-mpt.it/userfiles/files/3987840836.pdf
    • http://ekbdrive.ru/ckfinder/userfiles/files/27598133233.pdf
    • https://drproperty.in/userfiles/file/bulodanogabu.pdf
    • http://ceskylakros.cz/userfiles/file/takekefugezofe.pdf
    • http://ackerviewguesthouse.com/userfiles/file/soxojibuwanitovosovunon.pdf
    • https://ewdel.cz/ckfinder/userfiles/files/rusereteredujuvubamesevo.pdf
    • http://cappellastudio.it/userfiles/files/73348995121.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pokemon+go+android+10+spoof
    • 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_off0000f465.bin
eedb9c368f7fcd5258003b77c83e6a01146b671a8129b7caf2632d1fdfa7be4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF465 10964 bytes
font_01_sfnt_off00010da4.bin
1dba266e0b0bfcefc1c68b1d735c63d792a8613e7b93d37f0b15020a3fac7ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 19644 bytes
font_02_sfnt_off0001401f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1401F 16792 bytes

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