Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f6c9442a282920…

MALICIOUS

PDF

101.1 KB Created: 2021-09-06 07:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e573ab040f03720fa6c166eb30e218fe SHA-1: 64f9adfe66a2868e87b29c6b956db521ef7f3338 SHA-256: c2f6c9442a28292021b9f60011d7c20f70a2de3a57efe73f10c71808abfb168c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing content hosted on these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e75ece3a1e---24882601574.pdf In PDF document text
    • http://sequoia60.com/clients/875776/File/84537072947.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/a519966107e4d09052730b568ace4661/11557227139.pdfIn PDF document text
    • http://hzqzg.com/d/files/xoxejumitunexeneval.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976ab2305a6---muwilokorexuw.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/35794328966.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/90564908503.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/ad37a23633f7a291918b6350843601ed/kotoxemanukinifis.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210710_091102.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/kamanalapuwologamos.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/51650025737.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8dc2edb31---jikabiwokosawapug.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/88f7eb4bnun5k4i84r7dt6i5i5/49025441429.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/9669a938dd1995e7e3e6cd57859f05c9/zideja.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7f30631e69---53122012105.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/70a708e3af3196b22451b7621f7998bd/58816156348.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///202106023140_853210341.pdfIn PDF document text
    • http://gemcom.org/userfiles/file/lunefubugigodu.pdfIn PDF document text
    • http://whitedwarf.ru/public/images/ckfinder/files/ruvodibetowapuzovimib.pdfIn PDF document text
    • http://cichanski.com/Upload/file/zexavada.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/9e83d2c73d0ee94ac469447a6f3fc228/22109729545.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/d6a3e11c6e02e47f13f6cf498d635c8f/foturogerozap.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/43379586428.pdfIn PDF document text
    • http://metapolar.hu/tmp/69762352703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=dhaka+all+college+eiin+number+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000126a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB7 18272 bytes
SHA-256: eb25f5ffcb310dd84ef66d4bfd60e2910b7545fb7483eb870b3e4a717c4aa4ce
font_02_sfnt_off00016d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D6D 11136 bytes
SHA-256: 32167f73e9beaaa8eb0cfb9de0bc7ee8e1c7dd7a379847f90bd9b42b744a2472