Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5ca96d2ed6a6b6…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 04:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a350077d2f76fffbcb07790b97e5944 SHA-1: 42d6b24b8e8737c8a68363c41ddf9c79adf4ebc6 SHA-256: 8b5ca96d2ed6a6b61e07a4ea635ab6fdb9cdc25a09dfafa8c9462de6d2c46688
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087357dd60f8---nobugiburikoza.pdf In PDF document text
    • http://aryajob.com/user_upload/file/wobizurimururim.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/xupufagitizafupukaziv.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19282630332.pdfIn PDF document text
    • https://progin.swiss/ckfinder/userfiles/files/tijegesaxawefen.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d560a1d9bb2---84826879178.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/3cd6368be663fbc324e801bc4479e5af/nerul.pdfIn PDF document text
    • https://synersys.fr/contenu/file/82285634254.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612bb4da09582---41354489110.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/supokisamowibotijawabo.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/55091189037.pdfIn PDF document text
    • http://gewald.ru/content/Files/57118327392.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/53887633957.pdfIn PDF document text
    • http://runbo.net/upfiles/files/162723587175.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/5b74ceecc845afca6799a813f791629d/83682472833.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/bosudufu.pdfIn PDF document text
    • http://geose.ru/userfiles/file/50670393764.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5142fdebc1ccf3327e41b3355b5933eb/16379965264.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af7a9a2343e---bolebolepamobikemokuzuku.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/2179535225.pdfIn PDF document text
    • http://armanetti.com/images/63933799919.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/85137814245.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/j28bc3cs40657b8lbd7hv8p5o4/98053823829.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/62866e4ab55c8f563ebc2206e315ea4e/jusiwevuz.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4d7f0fd84---74010389.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=maths+crossword+puzzles+with+answers+for+class+9+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_off0000dd8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 11124 bytes
SHA-256: 7feed503d344660355cd26a08b38e2d11cdb3b77fce0961ccf062ca1f4e9604a
font_01_sfnt_off0000f795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF795 18404 bytes
SHA-256: 6488f0c841c6fb82e614946e1a7244fd7c5f0459e67be83e4c6fae8ce08abf3e
font_02_sfnt_off00012769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12769 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.