Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa6a73ddc5b1ab3…

MALICIOUS

PDF

81.1 KB Created: 2021-09-03 18:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 56bfba300e6a4bea9b6587e18bb8c64e SHA-1: 0bf041cad9122c4bdb3e44a7131138336261a77a SHA-256: bfa6a73ddc5b1ab39a98935b9fa881043f35f138370b919128f44df07f93882c
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution intent. The file's structure suggests it's designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4456

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://huntic.ru/uplcv?utm_term=assets+liabilities+and+owner%27s+equity+pdf PDF link annotation
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa00921a35a---30421513438.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/lawunoramomima.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608549e7bd237---rinufotudaxixejevisemul.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/838fd1f340df0c3300a9cfdf13b22e5e/tomivilikijesidelur.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc7932d1aa---gutifibosutojutiripidebev.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b907aa2d0b---87178222467.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48b1b7273d---takulusubojajun.pdfIn PDF document text
    • http://pb-book.com/user_file/file/wolosutujukurujuje.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/34945094328.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/tefudavuluwibiruruzad.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/gibubumemoxuzedanowozaze.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/petisuvijijarasiri.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/99405288141.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210505222045.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160f6dccb04d36---gewonasemilugasukiboxe.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/10571602716.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24936425912.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac59e49ac21---45419627953.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083eb6a7e554---45630711078.pdfIn PDF document text
    • http://cloverpark1960.com/clients/1/17/17c242f0968dc4bce059666b43fbd075/File/torikuvas.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/pupivewomalevivixobifa.pdfIn PDF document text
    • https://canoe.ro/Extras/ckfinder/userfiles/files/verudefunisi.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/14521903551.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/votijewukef.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b281efa9b---jodazu.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/xatabigiwajorapuni.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001148f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1148F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1