Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bcb7f4f0d779c56…

MALICIOUS

PDF

78.1 KB Created: 2021-09-04 13:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f40500b7549520fe4984cfcf014b69b6 SHA-1: 1b95b4e1f199a9775a0e47a5c4b392daa57deee1 SHA-256: 8bcb7f4f0d779c56634daa696456d77b743aec42fd8a86375e8ba27f8823a8e1
124 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. It contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are structured as a link farm, suggesting an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3586

Heuristics 5

  • 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
  • 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://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/0dfb6d53239afa1697668ea7c6449cca/wenexavurabetigojo.pdf In PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7d80c2766---53130686984.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/66133012934.pdfIn PDF document text
    • http://kiavysocina.cz/UserFiles/File/1616515244.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/jokeperupirijeduvixol.pdfIn PDF document text
    • http://sequoia59.com/clients/867919/File/51281549504.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/b6a161600c841348be8c26dbda30a7e5/98833746328.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/20217251055569766.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/36786547040.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/zamusojoziboxuramomom.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/46215186215.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612e4ac37a884---xizibubozotajafam.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/70736a0dc6d96f25192d1f6b88e029ee/44265774017.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756571910a0---newumelusafijuponajorid.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0a87a5c11---vuzoxabupufomugepeku.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/kogopabaxajororimekabusil.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a571059e3---10325891318.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/zanefewiwoj.pdfIn PDF document text
    • https://szud94.hu/img/sajatfile/files/xilazasirizubofatulitanap.pdfIn PDF document text
    • https://eniedu.com/data/file/20210821151303.pdfIn PDF document text
    • https://chennothinterios.com/uploads/file/82174817805.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/gajereda.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/78618659835.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/73469403846.pdfIn PDF document text
    • https://botorka.ro/userfiles/file/88701924701.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/699bb7ec5b57d13913f5e79cbde62666/33905291015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=carburizing+heat+treatment+process+pdfPDF 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_off0000f2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0C 11352 bytes
SHA-256: ec70354eb97a0927b719cd19f05470e021285e155c1d340275477e19c83674de

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