Malicious PDF — malware analysis report

Static analysis result for SHA-256 33196b8795b46e05…

MALICIOUS

PDF

79.1 KB Created: 2021-09-16 16:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5eb1ec5991a9cfe9606bb9a800af9533 SHA-1: c91ccf55d6fb1f2c334d2466a565208e4d42ca4c SHA-256: 33196b8795b46e054a8c54797fd429c1525f0ab7f4505adbc6fcdbcb7a470946
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm with numerous embedded URLs pointing to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being used for malicious redirection or phishing attempts. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 5

  • 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.
  • 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://kavtas.com/images_upload/files/zajemuto.pdf
    • http://hotelclinton.it/userfiles/files/53041504146.pdf
    • https://granitabrasive.com/editor_up/46295088265.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f8f86cc54c---14403333628.pdf
    • http://boek.se/bilder_umeny/File/vosasebit.pdf
    • https://geniodelweb.com/file/88607175398.pdf
    • https://marblobaths.com/app/webroot/img/files/52935756280.pdf
    • https://toppelletmachine.com/d/files/ripaxakifamamu.pdf
    • https://interativacorretora.com/fotosempresa/files/68578345755.pdf
    • https://mallorcaboom.com/res/wysiwyg/file/mekovelifefovowatodedu.pdf
    • https://seedcambodia.org/htdocs/cljr/data/files/98096120965.pdf
    • https://ehlibeytalimleri.com/resimler/files/5572675923.pdf
    • http://lasfyy.com/uploadfile/file/20210913024925885.pdf
    • http://greatwalledmond.com/ckfinder/userfiles/files/zeragarepadajivapagabin.pdf
    • https://semangkamerah.com/contents/files/xozamipizo.pdf
    • http://marisqueandopremios.com/campannas/file/lawemasedaj.pdf
    • https://dancleland.com/img/upload/file/mekuzatosur.pdf
    • https://szaniterplaza.hu/ckfinder/userfiles/files/mitodesesikowevilegidare.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16141a468cc8df---95033037957.pdf
    • http://wingmanresearch.com/userfiles/files/18647873581.pdf
    • https://noursportevents.com/wheelmarine/userfiles/file/mosedisuvidorojuzes.pdf
    • http://asckhn.com/acskhn/userfiles/file/11245237897.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=looney+tunes+dash+game+free+download
    • 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_off0000d11e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD11E 16792 bytes
font_01_sfnt_off0000e935.bin
70ee927ff2ce7f61786795bc9854fdfcb441fba8991a38ca6729f40b6dba3bad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE935 10964 bytes
font_02_sfnt_off00010255.bin
42ff84521e60464f6dc40c0569847a41ce25c5e33530e47b3b691da096d0c71f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 17220 bytes

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