Malicious PDF — malware analysis report

Static analysis result for SHA-256 565ec9f7445f654e…

MALICIOUS

PDF

98.1 KB Created: 2021-07-06 06:30:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aebaba1710a0feaec0cda95e3d2ff916 SHA-1: b25ada88d13431f48d351c0d6378d02918a5d150 SHA-256: 565ec9f7445f654e9f16b9930f8245a23f5fc5a42960a72cfbd0821bee1e9f29
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a69502b182f---86843206977.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16077a47857059---fomusokupam.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608379247194b---babijofebigaputisoputa.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/5e70e085457a2e6c302a4cd51975c3cb/vozef.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/a9197a4319f9e53b0ec9689f5fa17a5b/56918331162.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/bcade10cf0e7aec5aedbc40ca0b97c63/43943779052.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ad630b37b---mosoxu.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3195010149---54887680628.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/fa76d4773b1ccba9c1e07da606fcd4ed/bupomeda.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3741693327---75442836829.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/adb0ec6bb3e4ff0943e3656dac5b74cd/26695767807.pdf
    • http://kayamedbursa.com/userfiles/file/1881445645.pdf
    • http://sbairs.com/datas/files/76928766787.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce27a6d1fe---14702419981.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/63bf55e09e0429d6b766f4eb545dfc77/3002829131.pdf
    • http://bioscipublisher.com/files/upfiles/file/74650341287.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/091ec097e622f530c6ee045fd039899c/48372507709.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/6cutgaui6jvknpi9cugehed8i2/58171401195.pdf
    • https://dcimx.com/files/63633016808.pdf
    • http://greenberetrotcmedals.org/clients/e/ee/eef2f5edcbf7b69ea683240098563b39/File/77713485323.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/3f486607465cbee13d281b5fd6501c3a/85411286972.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609645cd76d15---19849799290.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/im0sl8cf4n2ncg8uplhnovsg52/95557856039.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=compare+and+contrast+essay+introduction
    • 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_off00011f0c.bin
ac4fe3339bef600d536a3e55d3a169f57273fc5ed2a9ca021b5f859f43783e74
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F0C 16632 bytes
font_01_sfnt_off00014a05.bin
ed2c96698bbd1974e406adfb15c96de10e87f42c2fbdfc9f77b2407044fb0613
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A05 10872 bytes
font_02_sfnt_off00016335.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16335 16792 bytes