Malicious PDF — malware analysis report

Static analysis result for SHA-256 3360d9d2699c4e5e…

MALICIOUS

PDF

76.1 KB Created: 2021-08-18 12:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 03c4cea68f6261c7d46cc6822986ecb1 SHA-1: 49fc9d9ea8da2c3c5b6122a196b6fb68e3e37070 SHA-256: 3360d9d2699c4e5ef5adf7d2c3226cfff263ac206700c7387183a8b3c5872ab7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed to obscure the true destination. The presence of these links suggests the document is intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=rational+male+religion+pdf+download PDF link annotation
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1610de1f256cbb---gigakemujuvazav.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c59981ce2e9---vixukojodajumilogonedig.pdfIn PDF document text
    • http://chongros.com/userData/board/file/94685765801.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/80874106851.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f694009d3bb30aef064db2e11caf8211/zekasonobetinovexujugum.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/jc9e8btcr5b2taejrc8ccmtmpi/85226261205.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/h3841avgse6psj6l1jd7ku17t4/xowifezuverikipajaxu.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210803_C05B469457BC1E96.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/5565827666.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/30496113443.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/72223189147.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/90c432b8fc5cda0d0ed79eb5d52e46e4/tobekig.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/edaab1ac9020d5c5b180178e6bbb0910/66754645833.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/79150848925.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a19a2842c5e---lifodiwufiduwomatugunu.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161057977930fd---67678402582.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/wabelekaxuza.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/dazenolapadagudavi.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078438279e54---pimojomemajurafagisiviwo.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bf91d9529---39776708434.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608694808f2f3---38998102626.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/dc42c37dfa819de9e9314ea0e8355eb3/barupi.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16087efc1be2b3---mutel.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/0b8f56a8722d8ea3bed2d64fb26c8bae/53924708791.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_off0000c74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF63 10804 bytes
SHA-256: 7711632bb11872e2ad0db30c43f0ddca0f1ccd168776f0b7b75ac0df43a7d8a3
font_02_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 16100 bytes
SHA-256: 5218cdf4cbfce91a4bca25ffc444741d3d045f9e5a491d2fab585421834eb9c7

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