Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9a361d36baa416…

MALICIOUS

PDF

86.3 KB Created: 2021-07-14 00:10:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fbe63b7f180bd0d18a8547e81ebc2e2 SHA-1: c124746466e6479053de9f5ce85c0c84644f848e SHA-256: ce9a361d36baa41682b676b0482d273aecfc828c9081862c886c5e8fdfc9feba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The document body is unreadable, but the presence of numerous embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://parkhighclassof60.com/clients/871169/File/4043697337.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/2143536077.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4b599e5c9---tetajuxuzirirexukav.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca8661f627---fuditino.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/1d68d0298b69fe8683a7e75561f1a53c/76527688158.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d6ed942d3---58234882536.pdf
    • http://clubselectionvoyages.com/images/file/ziwunobikiruvekipoxesod.pdf
    • http://timavoshipsupply.it/userfiles/file/nalotesizoremo.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095a0c468e06---jurozanagilo.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/3e22rqtprr4q5r3l37r8v26bdq/99738975638.pdf
    • http://indagosrl.it/userfiles/files/7688203888.pdf
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a19a90a060c---89888076906.pdf
    • http://monkey-do.net/userfiles/file/30700332497.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/suturuvokemepogiwis.pdf
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/diros.pdf
    • http://gerocuki.hu/user/file/ximuwefemi.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090ab61d2977---mapuwiwolejetofofi.pdf
    • http://bestbuyfromindia.com/userfiles/file/29433938949.pdf
    • http://cjmjwarrickhudsonfamilyreunion.com/clients/9/9b/9be434dcd9982d5451de1b36a82eb828/File/domijapofa.pdf
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/bb840a15368b3c6b68785f880c224934/nosulejukurugak.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099d0c50a3d1---vonizono.pdf
    • http://geteffective.biz/uploadfiles/file/10160101862.pdf
    • http://nyett.hk/uploads/news/files/61351084864.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/drkcm4tftk8p3im7l46l66brj2/dosekobebu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=love+yourself+answer+flower
    • 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_off0000ed48.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED48 16792 bytes
font_01_sfnt_off0001055a.bin
afa31e41cb34aa3112e711ba311a3c92af9b01ac5100b33a4a65a399ff621248
pdf-font-stream PDF embedded font (sfnt) at offset 0x1055A 17768 bytes
font_02_sfnt_off00013448.bin
62f78b93f2ba4b1707de673e2c295c4cd6c7ea21e3ec60dae105797d0832652b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13448 10340 bytes