Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3287c76c2050c1a…

MALICIOUS

PDF

100.1 KB Created: 2021-06-26 00:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e9459754eb76c4825c221a48046d26f1 SHA-1: 3c542942853505130978f4044cc6ea0198b29981 SHA-256: d3287c76c2050c1a16b97cb75813f1652093d3686d7fc7070d74a5efed3f6f3b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and other domains, suggesting an attempt to redirect users to phishing or malware-hosting pages. The presence of external URIs and link farm characteristics indicates a malicious intent to lure victims through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://oniceh.ru/uplcv?utm_term=imprest+meaning+in+english
    • http://ferrocom-spb.ru/userfiles/files/92272273719.pdf
    • http://panda-es.tokyo/yamituki-n/uploads/files/38818125527.pdf
    • https://rinducm1.com/contents//files/mutivugowilegexa.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/587173ae6a5e94474836d1188172d9ec/kevinesefijamoxexude.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/cb9e56202ac9e3d5a5af2111d9d42c0f/falogesen.pdf
    • https://landbondcorten.com/attachment/file/1bc612c02a17c280979858db886c9202.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa76f3400e4---pilimiredalinatujavamoxo.pdf
    • http://turskazka.ru/ckfinder/userfiles/files/16290390631.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/v337b58dq4ppjr6p2lu59pblm4/lasegatuzuma.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0ad600fd6---98617613914.pdf
    • http://princeworldwide.com/multimedia/userfiles/file/pokofepolopej.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6af5a7f3a---50033318316.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607365cae572d---nebepuvafutikesazel.pdf
    • http://sakem.org/userfiles/files/vulevezemurawaredopaset.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dafb958da5---vapixepuruzurig.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b42079ffe8---42103425718.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070628261e6a---kelajipomibadeku.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/3afeba5dda0925daec32d39808abe3a2/tavagategalebesesawinuwif.pdf
    • http://hncastlecable.com/d/files/nalepepusakagerabe.pdf
    • https://dienlanhhonganh.com/images/pic/file/dizaropuket.pdf
    • http://cz-synergy.cz/data/file/ludotod.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d30c1e99c3e---fepisezenowogegetogede.pdf
    • https://acryl-bg.com/userfiles/file/65207605804.pdf
    • https://oncetrabzon.com/resimler/files/94591587585.pdf
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001470b.bin
431ee803f675f84ea522f335eceea0379880c4946f2ea71d9db40318e70ba42d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1470B 19940 bytes
font_00_sfnt_off0000e7c0.bin
a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 3464 bytes
font_01_sfnt_off0000f53b.bin
4f20623ebe718e11869b577521152e71d2c702b76cf5a0f10c71bbb67e12b640		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53B 23688 bytes
font_02_sfnt_off00012f52.bin
ee925c29697b1437f662bc56080bb533135b2f58423fca1d1b505955cae6d563		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 10528 bytes
font_04_sfnt_off0001685f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1685F 16792 bytes

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