Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a22818f0f3a153…

MALICIOUS

PDF

73.5 KB Created: 2021-09-04 15:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 25aa913569901759060b1c99480e7c9c SHA-1: 49a416d7a65b42fa1c8ee7d73288523922aa7541 SHA-256: 00a22818f0f3a153fce654ffb227aea3dd3ad0b0ed692da7b2f83e073b4303b4
124 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as redirects to malicious destinations, a common tactic for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4113

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://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0icsgifp87qr5f0qjjggio2t72/65014609543.pdf In PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f1669926c---38714672092.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/78220351167.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/rqr6s4k7hqv146miu748ivtki2/99871270870.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/98172976830.pdfIn PDF document text
    • https://pastijptoto.com/contents/files/61491741343.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7dc94babfb---zupizitavakesu.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/78150488561.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/92713959246.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607478bc9569b---fekezuxabasinujumeteriti.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/jededetil.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-6-26/20210626031604382320.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/81140641515.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/091524bce1aaf3909139b73eaee294da/xuwazamomi.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/jirifivuwen.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/a5b9c9f37082bfb6515ae2e9b91bd8ec/jovogubujikifikitawipava.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/091c08859c282b157247c1a42eaad40a/jizetejunanimamakib.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/e150238aa90138381cdd93336778e5e3/37338614485.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/sipijugowusidesuj.pdfIn PDF document text
    • http://emeat.ru/var/files/wulozojezurokubuf.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/33836435595.pdfIn PDF document text
    • https://paperland.bg/uploads/file/zezuwerasinetoxu.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/45541131954.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/22436346786.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=isosceles+triangle+theorem+proof+worksheetPDF 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_off0000d369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD369 17984 bytes
SHA-256: da6cfbe53b0c277b85403541dbed2f27182129a7022e32bbaff29ebec8cfc2bc
font_01_sfnt_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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