Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05a14a9d524d336…

MALICIOUS

PDF

87.0 KB Created: 2021-07-09 03:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: be5a290a7dea18c196bcd723582429f2 SHA-1: ba0123f3d2db628bb08ce6492571137b54cdc6f7 SHA-256: f05a14a9d524d3366fc3519ff3409f44a78d7cdffbde0d1f2d99f6701cbea411
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URLs embedded within the document, many pointing to compromised CMS upload directories or disposable hosting, suggest a phishing or link-farming attack pattern. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://coretry.ru/uplcv?utm_term=repetition+poetry+definition PDF link annotation
    • http://greaterdeliveranceministries1.com/clients/61527/File/zimapenenasurazibiki.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/nemedamaxixokagoreb.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609029667343b---703174772.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/kaminusow.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/8634782faad50b9ab894cc71a465946c/37217224619.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba80ed1bda0---vowatebawito.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/254671f2c8344717b52e7378088b80d9/mebirexasazumitaduz.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1607698dca18de---zozixaxiwuweniwifetuzutuv.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/58328578082.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/4808e9de2f6b08d8da28745955312280/84295777159.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a936e612656---5576611299.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/jevikedidifar.pdfIn PDF document text
    • http://uci.ir/userfiles/file/26456824919.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/wuzosose.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6c7fe0c6a---tapogawagofafusegoj.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/7f476ubvljagcls78c29kjba33/dekegapagojifomobo.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/01b5cf9a95e03f49e3bb665e58d8fb8c/94510385828.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/gkgd3v48eaajmrpha3ds0fg6na/4240505838.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608074d08df65---pepipimurowokolurijunop.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/tosarironugifagewupizo.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/wefepuvolanewadopiviwoluv.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/belozakuwowedamoso.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_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 16684 bytes
SHA-256: 909752bf4be8e52a9daf2226172cf2d82bc44a4bef77a575761f34f6507b3f03
font_01_sfnt_off00011f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6E 10272 bytes
SHA-256: 5055deee3be9cf6e4db562acb929e065e56695582a9dab728247b0088dbe6878
font_02_sfnt_off000136ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.