Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b6990ed95a0f3f…

MALICIOUS

PDF

82.1 KB Created: 2021-08-21 07:52:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b5fa3f502c9458f7eefec71346b37016 SHA-1: 0df0c499eaa71cdf2983a31f35123f098dc20ae8 SHA-256: 12b6990ed95a0f3f76afd4256cc0f7ce5d501c32c6a7cdc60cc80de4bd895301
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm directing to multiple URLs, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The file's structure and URL patterns suggest it's designed to lure users into clicking links that lead to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e0eb4f13f---vozarudisurefejixav.pdf In PDF document text
    • http://aweibel.com/Photo/file/kumakodajimewuzun.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607521aaf1780---zegutekik.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16084e69ab6ed2---wibimij.pdfIn PDF document text
    • http://billsky.ee/files/file/72856091251.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/fonixurugubaxiloxi.pdfIn PDF document text
    • https://nabsangram.com/userfiles/file/rejezig.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6d31d54cebb2f808d933b514d37dc18e/reguwamuponamuvekimowin.pdfIn PDF document text
    • http://janatalnajaf.com/basefile/janatalnajafcom/files/wejolilakururile.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a540fae933e---31324731141.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111d34eb5aba---vasejimipofimefamu.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/pekegojoroniwukeleb.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f062dfe60---25949852724.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/591d717e6dcd1bbda2c0ad79b73910a3/tarusoz.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/005dfa94802abb874ee3f1c6e960c045/ruvojimirazadiwow.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/kemuvimiwamaxo.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/dpd39mp8n1ddmoe3tksjm4ordq/51102697415.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/5k52sllmndvqcu7b0gcmg8su64/5489624145.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/gidazinobolulanapadiri.pdfIn PDF document text
    • https://webmenuplus.com/images/file/difixepuxe.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/fcb78efe7826bf8356c9d14d71cd03a7/pusoponibagi.pdfIn PDF document text
    • http://artstudiodesign.it/userfiles/files/50623977652.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=distribucion+uniforme+ejemplos+resueltosPDF link annotation
    • 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_off0000d6dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEE 18996 bytes
SHA-256: 2e83c9aeb72ca8d5c2f63d910f79c68abf0d285e1f735a32185e60759a0198f6
font_02_sfnt_off00011fff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFF 10852 bytes
SHA-256: 1da81f38ce2b95628cee22bbbfabae9c268b86c77954e26fb1495f8653d49001

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