Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3607b816682513…

MALICIOUS

PDF

76.2 KB Created: 2021-08-19 21:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b105c0bc1ed8919c11d87cb674981c33 SHA-1: e8d9abdb520d8a819976a444803874d7d41a49da SHA-256: cd3607b8166825134bb3e2b83e166db5c7b8c3250c11ebf0c03d592c510e3598
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' and the heuristic findings indicate this file is designed to lure users to malicious websites. The primary function appears to be acting as a link farm to distribute phishing or malware content.

Machine Learning

  • Nyx PDF Classifier clean score 0.2303

Heuristics 5

  • 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
  • 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://huntic.ru/uplcv?utm_term=need+for+speed+payback+career+mode PDF link annotation
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/0e799b44eae7d13a5debb94124e6a044/fapazokakavolofaxewubu.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/21214407148.pdfIn PDF document text
    • http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/66580369219.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/9faa68f26f65db94145a0053d209df58/62819818456.pdfIn PDF document text
    • http://tion.hu/upload/file/vuloxapopibo.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ff1f836d611---bowawoguxeko.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074fca416a87---gekitipibamomofosed.pdfIn PDF document text
    • http://apcmagon.com/userfiles/94641189330.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/lgkej7s9e4rrjdh5nko1arbl5c/34074674478.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/4952e0780d2a912ecf8e67bbeab72a36/vaviviboratujawatagexase.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e210f86fa9f---boleburofadutiz.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bacf986d731---kakuwuzus.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/17189880091.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/vejetudo.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/vqje6r27fggmrjkg482c77m3ce/17208715689.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/2933a51e98d14d108f4558f812e81f68/xazemasetejonodob.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/6926478175.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021072401241234.pdfIn PDF document text
    • https://stvorki.ru/files/file/rifufuxanapifi.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/srithdiqvfeudun3g1hbrksc01/kazajedoparulo.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/33501951821.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5a5266ee3---pupogelemazeluwapuxozeda.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e1ebe78b0---99001502480.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f5cd908c8---banibo.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ac7a3e837---40344345576.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/tusixatogorewovodimul.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD9 10764 bytes
SHA-256: db9df605b56fcd310900977333c40ad134a91901c73aa17e692a43f22e00f639