Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdf6b01ec099536…

MALICIOUS

PDF

66.2 KB Created: 2021-09-28 01:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bc9e386c079b69166668fcc5be7224ad SHA-1: 0c0735c7e01dc1976a74eb28e6fc19ea9521eb3c SHA-256: dcdf6b01ec099536ea633e203dd1704b0a0867aeb5b121f7413711beca966904
94 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. The PDF contains numerous embedded URLs, with a heuristic identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a network of other PDF files, likely as part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2639

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://perfecthospital.org/ckfinder/userfiles/files/fabiguwusedagumijux.pdf In PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/lobakotowe.pdfIn PDF document text
    • http://retailcop.ca/files/19413114378.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/26867127466.pdfIn PDF document text
    • http://decorstore.eu/upload/file/rabovupuxuvidowur.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/vibofamepowosotabizone.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/58034186616.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/92547282011.pdfIn PDF document text
    • http://bixenony.com/userfiles/files/pefatitosot.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-16/20210916105155666653.pdfIn PDF document text
    • https://tutorsbureau.net/userfiles/file/zajebikurabijakuxawazi.pdfIn PDF document text
    • https://brakos.it/file/62532583470.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614cf2fde394e---22221524494.pdfIn PDF document text
    • https://mi-stores.com/basketballtotaal/images/editor/file/meguxi.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/13911332672.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/18031461048.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/78323014944.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/zirapefijejinigepoxaba.pdfIn PDF document text
    • https://iohrp.org/f_files/files/50253900887.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/35761831471.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/salusukumokerukezeb.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/wezibejidero.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/25586791358.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/lalibofaxep.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/zinesemujow.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/denumigoketesubixozu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=wwe2k19+ppsspp+highly+compressedPDF 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_off0000b548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB548 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5A 15488 bytes
SHA-256: b037fab963353e15ad5613ec1114ff6c0b10bb5006e3c3b87aefd673297b7297

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