Malicious PDF — malware analysis report

Static analysis result for SHA-256 60625232c2aaf623…

MALICIOUS

PDF

84.1 KB Created: 2021-06-29 17:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2760214191eec25344630de4509f2cf9 SHA-1: 0d13c046b43d98e154f0d5411c1e641a5439894f SHA-256: 60625232c2aaf6236e43520de088dced8bacdd5c772ff9d993b3d3ab4ff01f9f
196 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, exhibiting characteristics of a remote-support tool lure. The document's structure suggests it is part of a link farm, with numerous URLs pointing to potentially compromised websites or disposable hosting, likely intended to host or redirect to malicious payloads. The presence of embedded URLs and the overall heuristic firings indicate an attempt to exploit user trust for unauthorized access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://cambodiaangkorhomestay.com/userfiles/file/nogovakipidis.pdf
    • https://fnb-concepts.com/images/uploads/files/belutawonugavitiwubu.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/e40117614896f376d2ebc587c87e44ee/20853142438.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8077b9df1d---38156009574.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/26ae77adf4f0da8926e677697a3f2c5a/kipuvotijopowevam.pdf
    • http://arci-mp.fr/admin/File/junerimixamoduzo.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608301393b833---58855983203.pdf
    • http://zabradli-znerezu.cz/userfiles/file/menijijuguf.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/dimesuxelatiw.pdf
    • http://bigsvatcharasith.com/userfiles/file/41783393165.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/rq9sqrpggre2f38noidqn8o092/49306015139.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/a0c0e93083c93e1777c464614f131767/vurakirimux.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a885c15ad89---68877335877.pdf
    • https://mabuksusu.com/contents//files/luriwupozawodomenutudime.pdf
    • http://bajcsidavidfoto.com/_user/file/zexasawovoxuniwun.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608794b3dda36---26696414766.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce20c67702---pinadalaponebixujo.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/2040fa3f9bfd77830fbcbc7111612400/lelone.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088bae6ee436---61574650501.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a281fb150687620f6f289f59dcceed3f/8499944678.pdf
    • https://protrialse.eu/files/files/63095490868.pdf
    • http://inbjnews.com/data/cheditor/0603/files/xegofigixixawawif.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3dcda6e53---dakokaribixulobok.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac25e4eb471---bolatiti.pdf
    • http://mebco.ru/images/file/76063051482.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=computer+hardware+and+software+components+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_off0000e4ae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 16792 bytes
font_01_sfnt_off0000fcc5.bin
65a628c434e01821b71eb4213ebdee20bf274c65b203606696e015896d1e1977
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC5 10964 bytes
font_02_sfnt_off00011627.bin
02d9e6f70d0acbdb7c94226bb98df7fad562c56acdd08179a7aee11949316372
pdf-font-stream PDF embedded font (sfnt) at offset 0x11627 17296 bytes