Malicious PDF — malware analysis report

Static analysis result for SHA-256 df15dcd67fd6adb3…

MALICIOUS

PDF

86.8 KB Created: 2021-07-02 06:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2fa1755773bcd3113a680d743c5095e4 SHA-1: 417b6f0fb76119fc055ab72a72a91b338afdcfc5 SHA-256: df15dcd67fd6adb31fc6f0bf459ecc1191cde715dee22964bb21fe677e2463b9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://khacdautron.com/Images_upload/files/16642061638.pdf
    • http://magogaralbamoble.com/galeria/files/modasogop.pdf
    • https://digireg.se/upload/bewewelonim.pdf
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082839bcffe4---bogewawedonelibomi.pdf
    • https://realxenon.ru/uploads/files/83507019135.pdf
    • http://solemarservizi.it/userfiles/files/pupufezog.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084364587366---molezimimi.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20e1f16c94---kivogelomupoxuzosis.pdf
    • http://thamdinhgiadaiquang.com/img/files/37838201686.pdf
    • https://paklya.su/design/img/upload/file/jolulunowumilataji.pdf
    • http://adamlegal.com/userfiles/file/31082500138.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202105011056189154.pdf
    • https://theurbanthinktank.com/files/fiwabojo.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609041b19af90---685701091.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f2362e6f2---motosele.pdf
    • http://medob.org/SITE/files/editor/file/26222101246.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/86efc85e91aa9327fb588efd1afe4d5a/tanuwitenibuvukowapi.pdf
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/gexowilir.pdf
    • http://jar-ted.pl/file/14152758173.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/5bcfb5c20e5833a13fd5b9499413514c/vikozotodudewaze.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b90db1aa3f4---96650693468.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/r032qlojs7cnsm6ksvjreoorid/lujejipof.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160af8f552e0d9---73527545329.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750cf4b79b4---lajejumojiteluzewepulexe.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8616f7d94a---muzomutugixekabolotimo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=c+programming+theory+questions+and+answers
    • 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_off0000ed8a.bin
d14aa1d28c78461107173e3c1c64ace81a7d23000b0c27b33f641abb1774e982
pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 11272 bytes
font_01_sfnt_off00010761.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10761 16792 bytes
font_02_sfnt_off00011f73.bin
a044d4d0b277d522bcf5b40fa51c25ffb075f6eaa80b4e1a5895b083afd36a58
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F73 17588 bytes