Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ea43f46722a5fc…

MALICIOUS

PDF

84.8 KB Created: 2021-07-02 09:41:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e97c9646ad866ac82399c11e795ae301 SHA-1: 65933c83b87d2593b035ad1100f76947e9fd0c35 SHA-256: 32ea43f46722a5fc7bc82225633e6a35dc32c3c6698d0b8c86617c96e5d012da
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The PDF structure itself is heavily obfuscated and contains no readable document body, indicating it's likely a container for malicious links rather than user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607701a77083e---82170090201.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608689662a05e---87056729951.pdf
    • http://aarogyamedico.com/userfiles/file/56494191801.pdf
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/93959d560cb979cc50c2ee37b2edc1d1/63099710561.pdf
    • http://canvangdientu.com/images/file/2672361051.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609871d491a3b---84563638890.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/aheuo3ap97csdisuafjdtv8617/59051417786.pdf
    • https://kidneystonetreatment.in/userfiles/files/84030138704.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096957be6b36---vemenipobuva.pdf
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/n2qqp8bv0jgfp9b4bjsp7l1ed0/32081458681.pdf
    • http://4998horo.gmmwireless.com/contents/files/43577726906.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a035e567f4e---16215441564.pdf
    • https://mdteam.se/ckfinder/userfiles/files/ferimotomilutojudabilutel.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55e111d54---21046317659.pdf
    • http://konemara.hu/userfiles/file/42562091832.pdf
    • http://fondationmonetoile.org/clients/0/0e/0ecfe6182781ff486fe5156d2e85c11d/File/toginujisemisojo.pdf
    • https://detectiveoffice.net/userfiles/file/95768518936.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be265ae900---64278627310.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2b6373391---pezotewakaralukevaxipu.pdf
    • https://butterfly-propertymanagement.com/userfiles/file/kafosonazojojobuwozutek.pdf
    • http://ingpoggi.eu/userfiles/files/moriviwinapawefaviwokula.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=all+movies+of+twilight
    • 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_off0000e856.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 16792 bytes
font_01_sfnt_off0001006d.bin
c14e5ad0cf2f04168b0c9651d723d4bf148dbe40e7a6914bb165559e9b259c91
pdf-font-stream PDF embedded font (sfnt) at offset 0x1006D 10428 bytes
font_02_sfnt_off00011822.bin
e89733f5f519726a9ee52d0c182fbe87005d74afc8a78b5ea1216c0b1957bec1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11822 17160 bytes