Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cbce3cb6224985d…

MALICIOUS

PDF

76.0 KB Created: 2021-06-30 18:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a18cb13e9cd7c6ba6757137f42fb96f0 SHA-1: 0f1b756e059c7452fc0b360f821c4923f8cddc1a SHA-256: 9cbce3cb6224985dd3e7f5a8a9e535fe815123912d38d133d47774f8f4246f61
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier further support its malicious nature. No scripts were extracted, but the structure suggests it's intended to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7403

Heuristics 5

  • 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
  • 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://crysiq.ru/uplcv?utm_term=lightroom+classic+trial+download PDF link annotation
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/c051bd30983761ed3e3e979c33ffeff6/65501097594.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/faarhg3gtcno77s2d1roqgl7v1/48652844512.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/29883774314.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/pedipewawezexusuwofapaj.pdfIn PDF document text
    • https://realschoolspirit.net/scauserfiles/files/gasewodipi.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6481300a81---rujul.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/67c835487ee5ef4dec4aaef6ac1d2385/56975513234.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/vegoj.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5fc8dd064f---kosusin.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/96231a2de6d67fc9022c6799d04eeba9/24200718722.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/fcdba5bf75179a462f5ab461922bc3a3/76644168991.pdfIn PDF document text
    • https://fwullong.com/upfiles/editor/files/5291167599.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16093a543b820f---32891087874.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/f0677a4d153593ad8708110878e6d18e/mesugunupafegewukusa.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/fuvisiwolumuwe.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/6139808213.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/73014954720.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/166uiamib1k28mkstm3ae6gj05/65993574378.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0cb7b7755---41743082858.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/5b95ef15b4d8ef5484722b0961f5fda0/dukemu.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607538008e626---lusobujagugo.pdfIn PDF document text
    • http://weingut-suppan.at/files/69988545154.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/60118980273.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/obmc1dcbm3b95rpmglchr81nt2/69439376727.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_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1