Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ca9ebe2db4f359…

MALICIOUS

PDF

85.6 KB Created: 2021-08-15 18:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c013339242bdf30ace4c9223e7504d58 SHA-1: 312102d015d94eb91aa4c94a67370efb92c90f62 SHA-256: 75ca9ebe2db4f3594f51dfe222055ab889c04161bc82950732ac3b759a09c1b8
164 Risk Score

Malware Insights

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

The PDF contains an embedded JavaScript stream and numerous external links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. The presence of JavaScript suggests an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/2pqg2abk8ma1ei7381puods9l5/20387734499.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d72ea3325bc---74713314548.pdf
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608932e9eb226---81136661206.pdf
    • http://caffepontoni.com/uploads/file/43750062685.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607672f48f780---wovozexu.pdf
    • https://kozhikodedeaf.org/admin/my_files/file/99710858308.pdf
    • http://files.ibiza-ferien.de/file/wufawofu.pdf
    • http://rauvuonsach.com/images/uploads/files/mevudak.pdf
    • http://omonetach.pl/foto/ilustracje/file/44319992350.pdf
    • http://kiuruvedenlukio.fi/tiedostot/file/94335050358.pdf
    • http://conservativista.com/js/ckfinder/userfiles/files/reberodajexinunovorisa.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16103a0867ea2d---44122028090.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/ace5703c5a9a8bd6cea7a5fca6939254/wirakekakewakovijaji.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098197b59637---vapirikima.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/ne0ie78vs91dfhql1a6r5512i3/kakolidameluduzofol.pdf
    • http://stavo-bazar.cz/userfiles/file/94069566714.pdf
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/10205335658.pdf
    • http://fratellibeninca.com/images/file/midagizuvesar.pdf
    • https://birotex.rs/images/files/tivifobisokopitorube.pdf
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/cf048d00e5883bd6075fcb00da810586/23130940397.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608496dfa16dd---gusenekenuxigebilexugu.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/quhhbrsa67jscnr82r7hhilc9e/65453506867.pdf
    • http://sakurahoaanhdao.com/webroot/img/files/67442215257.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/moaki1reppif86ld6gomllalna/98831335360.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+get+modded+crew+colors+in+gta+5
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d39a.bin
fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
pdf-font-stream PDF embedded font (sfnt) at offset 0xD39A 16144 bytes
font_01_sfnt_off0000e919.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE919 16792 bytes
font_02_sfnt_off00010130.bin
88fde2f3533edbc4fa956bb942f9e95c70ed59eb9f3bc16297196362f8d0ef27
pdf-font-stream PDF embedded font (sfnt) at offset 0x10130 10924 bytes
font_03_sfnt_off00011a4c.bin
5d48ef449d3c29695c224aa2bf75b861d7a329a29bb274b895cada3d95a030a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4C 17276 bytes