Malicious PDF — malware analysis report

Static analysis result for SHA-256 360bf2fefd452cc4…

MALICIOUS

PDF

81.3 KB Created: 2021-09-04 14:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e27a521e13eb9b8144d4091ecd57846b SHA-1: 68df448b37fb34f23c791f1f51126920d307ca62 SHA-256: 360bf2fefd452cc405721cf4d94f148577e82b36ace886f00f16f63bdd56569f
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS upload storage. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://straub-online.ch/userfiles/files/70756457248.pdf
    • http://klasykarozrywki.pl/public/images/fck/file/nekigilerubutugijifut.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a922bed5f3---81228025022.pdf
    • http://canxetaianhduc.com/images/file/79512805843.pdf
    • https://locoffice.ru/userfiles/file/tegowafefufi.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16114ce33e22d4---16034173812.pdf
    • http://madang.eu/f_pds/fck/file/tulaxifi.pdf
    • http://fqcycpa.com/jingkelun/userfiles/files/20210609112710.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/fbe4b1bf2ff4c372e877bf2fc6da406f/3824285330.pdf
    • http://acecaalcoy.com/userfiles/file/61200586893.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080994e2debe---womenomisixizowagugovut.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3cc66630c---42383914669.pdf
    • http://kaushalacademy.org/ckfinder/userfiles/files/5744246656.pdf
    • https://scavilecis.it/userfiles/file/48700257096.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f1e73817b64---25649933660.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/8ap9ki9kimdi8o7kise15q5qbe/bamejazivuriv.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/b2e6d4fe5be67af6e1f7c90d40196acf/larikovinemezavatokis.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6lru4aliikhvuru9n4vdbtlv95/rakifupozipofojubojaxave.pdf
    • http://sea-cruise.ru/ckfinder/userfiles/files/papatokujise.pdf
    • http://mail-ex.net/userfiles/file/72720099388.pdf
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c37492b1b---zamadom.pdf
    • http://batistar.fr/userfiles/file/pakexujibajulafut.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/7d335b81af07422bbf6b9143200ac170/lagifoga.pdf
    • https://dgaspcsm.ro/ckfinder/userfiles/files/91976035730.pdf
    • http://nbkhjc.com/uploads/202109/file/210901093432881209x85nux0us9ji.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/59e645b3814b1194850e56c0e4613110/11666570276.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=revista+noticias+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d579.bin
1b1358c132456a91a7e7054d0eb83b47c71fdfd43a600fd8a23da96cc58d9ab9
pdf-font-stream PDF embedded font (sfnt) at offset 0xD579 10576 bytes
font_01_sfnt_off0000edd0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD0 16792 bytes
font_02_sfnt_off000105e2.bin
83a9da2f981af8d61670c9d6721342da35a9ef106cf037991a0554d012e99bef
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 18552 bytes