Malicious PDF — malware analysis report

Static analysis result for SHA-256 0998208b5bc9cb32…

MALICIOUS

PDF

90.2 KB Created: 2021-06-30 16:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1b304ca0d08e7000357ff638ef2c0a4c SHA-1: 62b31dfe53cd7ededbbfc65f19fb87074c148844 SHA-256: 0998208b5bc9cb32c3be7bc442c8787174fbf27763f291ef7c02bf8609a4c6ce
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads. The presence of numerous links on disposable or compromised hosting suggests a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b0af889b489db941f970cf7ea30173cc/5048306029.pdf
    • http://tpdw.pl/userfiles/file/wifepaxadenudotufegobi.pdf
    • http://thaoduocvn.com/userfiles/image/file/46145795575.pdf
    • https://balajitutorial.com/admin/userfiles/file/tetenaxuzuteruledoxeki.pdf
    • http://www.bandungmesin.com/file/firafimuzoru.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/34645475542.pdf
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f032bd0631---zateripijifiwopamor.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/a3c57a1e4450ff6c666710d003946c98/86954379746.pdf
    • http://alliance-ltd.com/userfiles/70087028644.pdf
    • http://www.aadhar-interior.com/userfiles/file/8587828882.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/76698219c4281bf152bb7ac1861557aa/xozovaxonulerefinig.pdf
    • http://studiomarazzi.eu/userfiles/files/terurigidun.pdf
    • http://kingsfinancialconsulting.com/userfiles/file/92433311243.pdf
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/suzolilipawujibidug.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085096598318---vozezamadosapotikutu.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a044f492eef---xufor.pdf
    • http://www.annaleehuber.com/content_files/file/21352618344.pdf
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/13804083447.pdf
    • http://splogservice.ru/content/file/32981271161.pdf
    • http://www.cbs-emballages.com/upload/file/tonexalujilimon.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/c36cb77c6aed98c9ccc1e4d07f7f1a83/guburew.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160881af744fc1---11252441322.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e035vo9v85a8k6t3aefanj03to/45417450179.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=3+doors+down+time+of+my+life+songs
    • 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_off0000fe70.bin
4b908701e21e0f393f6a79332bcd7c6221b20ebda668d44a35f3c2f60b0f47ee
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE70 10808 bytes
font_01_sfnt_off00011734.bin
603417e18c19d59520d8b5f45f1b5a636edd0e94ea481b8c2010ab37ab09b75f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11734 16948 bytes
font_02_sfnt_off00014373.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14373 16792 bytes