Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1ca466dea29fa2f…

MALICIOUS

PDF

97.2 KB Created: 2021-08-09 15:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5b09dde6248d750b0a5750cc4e216903 SHA-1: d7710556ed394f7d1b0fa9605e4f0533059cedc5 SHA-256: b1ca466dea29fa2f98d89eebe95166a82945b67bea4032103bc698bb249a5ee3
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and content suggest it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://queure.ru/uplcv?utm_term=tambourine+patterns+book+1+pdf PDF link annotation
    • http://maxbrio.kr/files/files/lixituxibotokaduxakopovi.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bee8704e772---7138996559.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/nimakukilosagomixuzigudi.pdfIn PDF document text
    • http://promador.pl/userfiles/file/suvedigipinadusefinisogu.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/s5a1qifvsnf8dluarfisdo5n7q/45792239777.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/6fd9ef18771261e92ef373ccab4ae9bb/fogajubibajew.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/nimezefudipokunuk.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/55048201199.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609643af03ed0---nogisadupigunedutewopi.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/5f1p7t4bmbs10h7bsg89ag2gq5/24034432174.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/tujiwovefokoni.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1a10869c9---47430497872.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/37026079872.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/zizukugoleloziruxuju.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/1bd20289817a3aa7246e99209d5eca4f/81516991445.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882c1e3d1f8---80386675421.pdfIn PDF document text
    • https://educhina.mn/editor/files/guwumewitukokijugumotes.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b771a28c---dosuxisovotofalirububod.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/29780544468.pdfIn PDF document text
    • http://gillyard-johnson-mahoney.com/clients/62114/File/zorujabobatexewanaridoler.pdfIn PDF document text
    • https://fiberglasssupplydepot.com/userfiles/files/55601574046.pdfIn PDF document text
    • http://bougerpourstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/50530753692.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/48486837884.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0550a5ebef---timaniwugolopu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001127e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1127E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A95 10960 bytes
SHA-256: e9797faae3a1f54a37857beae1cf6a6b782ac0e22c0b470c6202f563f6e24b9e
font_02_sfnt_off000143d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D9 19056 bytes
SHA-256: 8b384ecf501ee36900ae7d849926d33a1529f7aa36aa7cfffa76fd40a1eb2e86

Open this report in the interactive analyzer, or submit your own file for analysis.