Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d614bd2da68a7c…

MALICIOUS

PDF

78.8 KB Created: 2021-06-28 03:16:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64469961c7731639d4cb70d9bd65639c SHA-1: c6a017c84a3a5d339e521ba52a7b0e00a26cfe40 SHA-256: d1d614bd2da68a7c8bc23dd590e31f997ebf8634ded9abd4cc7e2dc4687ab230
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to various domains, many of which host PDF files, suggesting an attempt to direct users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/e427aeb9b4bb882e90bf68dd20d79238/83488079499.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/1mrsp81ugq414rnkefifo4a6b2/84117769252.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31567e6f0b---594379036.pdf
    • http://yuanjen.com/ckfinder/userfiles/files/jakofugagaminetekimew.pdf
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb5f92949d---visudozafujelitog.pdf
    • http://flirdining.com/uploads/files/jobejabalimitazupal.pdf
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/93201cf61dacf013c85aa19afb514961/gamorerefufaw.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/pr6tblc3j8ibm2b0uocif96dr1/dulidazus.pdf
    • http://thecoferfamily.com/clients/7/78/7892d776c92a08c80f86ebc6236678d2/File/jawuwiwilafenatokitape.pdf
    • http://markone-tools.com/upload/files/wulitidit.pdf
    • https://soechi.com/userfiles/file/67082283572.pdf
    • http://jiuxingchaoshi.com/uploads/file/241156563248.pdf
    • http://euro-ex.net/images/blog//file/66634792085.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870ac37389d---jefogem.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba14d959e98---magabutovumuvanofozoxul.pdf
    • http://anhbanglaw.com/userfiles/file/95494714588.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609c72563a3dd---78252776865.pdf
    • http://cambresisemploi.fr/ckfinder/userfiles/files/60906281720.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d25725b9148---14655098177.pdf
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e363dfcaa---fekurogenejof.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/cebeb7f0dc8d1f1e7deeb7f7c9442053/pinufoduvudanapasodijor.pdf
    • http://akinmedikal.com/uploads/file/dulobupedutusatezavol.pdf
    • https://jdlpartnerss.com/userfiles/file/jukumif.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=upload+pdf+from+ipad+to+website
    • 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_off0000d1b0.bin
eb2465331a8c7918442b32a0c6df38c63c1710e34be4dedff827e9fc6a3bb997
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B0 10788 bytes
font_01_sfnt_off0000ea64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA64 16792 bytes
font_02_sfnt_off00010276.bin
1b5a30579d69347ad88fe74f9765cf5284c7df54af9a191650dc714290864af9
pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 16820 bytes