Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcc93ebaa5bb19f…

MALICIOUS

PDF

80.0 KB Created: 2021-07-02 01:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 067c0fb8014d5564c584a2646616c8e0 SHA-1: 5d45a3865eb74cb3b5ba405a32f8bc5fe2047790 SHA-256: 2fcc93ebaa5bb19fdf04c3a25fa860cc2409d5fd99ea73db72db052b519ed8b0
124 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress sites. This behavior is indicative of a link farm designed to redirect users to malicious destinations, potentially for phishing or malware downloads. The ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

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 http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe3d773e5f---6903464132.pdf In PDF document text
    • http://www.monts.sk/upload_images/file/58468542130.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7c7168acddfec4a812befc7f011c3205/93536855659.pdfIn PDF document text
    • https://educhina.mn/editor/files/jajiminivovafujixuwiza.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/24489214504.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889839285d2---mexekuwaravirese.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/5811f9bc9b81a4997b71f158fac59fbf/paguwunikevibetozugo.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/dfd37611c3da447338e931b60872f493/50520219806.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/reveg.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ca3ddab4f---tegejodubes.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/7badd74eaf19297d633ef1924c4563ed/mewuxizomaseg.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/6bc0b6bbe61053e9561891c71440ea6c/34565199117.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b242149335---sivomakikifikovomo.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-5-23/20210523102859120797.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/zefafirokurokijavejinez.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608db12353410---luwegelukatomozoxuto.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/71825401925.pdfIn PDF document text
    • http://vodnik48.ru/content/file/pesekoxed.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608c30bf991ed---51035461950.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160923f65a5e35---42302114750.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cdc6a0e9e---49186892697.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ra0onsjdi9aihhconps1i2juhi/6800531029.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/feludu.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d07c35db1---jowefidedaditiwuzuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=double+to+int+conversion+in+javaPDF link annotation
    • 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_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCB 10660 bytes
SHA-256: b404d014b0d19721a37a6ead47866d56aff264eb93d2f757865e3ccad9720c4f