Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e37674be27a49fe…

MALICIOUS

PDF

91.1 KB Created: 2021-06-29 09:51:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f729ce1c9971df9cc018d64a98488cd4 SHA-1: 22130cfe8c23b66dbbeb7eb3e02426b9eae62563 SHA-256: 9e37674be27a49fefb4d1cb2ce9cd636bf350dc1479538ec3ff2e3180a47eeda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://ahkjt.com/upfile/file/vixidido.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1608de9de3f8b5---nemojoxebokedamuliwav.pdf
    • http://fxmeat.com/upload/file/3984081ea16e2564405ae18cbfcd7408.pdf
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/pururavo.pdf
    • http://zeminyerkaplama.com/upload/ckfinder/files/61024678068.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160759e7559b9e---89948487131.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bb3c850e7d2---25342644253.pdf
    • http://yasaitogo.com/uploads/files/14052788814.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082039031583---15329383051.pdf
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd305fadb---94975881775.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f4cfecf80---88388692191.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095875fd0a1a---wefexeg.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/mvhqc16hk7mtk8d42epscp5f2p/80581760836.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c886fa1d62---mapogogazit.pdf
    • https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/el7lcimgoutmmq56gq67666v6q/92765902001.pdf
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b658f9a310fc3929c668d05949933f9f/bogovapamiwivomaduwarekid.pdf
    • http://bajcsidavidfoto.com/_user/file/redapapiradamakadu.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2c7963032033d1a5d3c5c3a88c9b8d3e/54234463589.pdf
    • https://baohohoanglong.com/userfiles/file/40920905490.pdf
    • https://arket.io/wp-content/plugins/super-forms/uploads/php/files/67bsqj11t8b0m5o4cenab77goe/190575548.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ce9462ce4a4---pelivowiwokigiteked.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606caf6885ecb---66431942644.pdf
    • http://www.tobywells.org/media/fckdir/file/kitazemitiwanukupawani.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072ccf6a00d0---86356856507.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=mathematical+analysis+and+numerical+methods+for+science+and+technology
    • 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_off0000ffe0.bin
52bfd013e67282a6a0e23364b263b7b202a52e38739623fde2f71dde9439dcf6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE0 17228 bytes
font_01_sfnt_off00012ca2.bin
28db5a20806e5ebcf28bf973b2a3a4dc8fee47cd2ff0af9dd692c7362018dd19
pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA2 11132 bytes
font_02_sfnt_off00014643.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14643 16792 bytes