Malicious PDF — malware analysis report

Static analysis result for SHA-256 d116ad2d928f678f…

MALICIOUS

PDF

81.4 KB Created: 2021-09-04 16:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: abe28ec903842d113b7bc24e74616a3d SHA-1: 8c5ab6b4776f9ef73940e0382c34dda9782643ef SHA-256: d116ad2d928f678fb12fa686c85884763ec2a70cf9bebaf004f3494256a7aaa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that form a link farm, with many pointing to compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 https://coretry.ru/uplcv?utm_term=gcse+maths+gradient+worksheets PDF link annotation
    • http://closehorses.com/userfiles/file/50509854229.pdfIn PDF document text
    • https://kiofruits.com/admin/uploads/files/gozevewomaposo.pdfIn PDF document text
    • https://steammining.com/userfiles/file/makajo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e1588db91c7---54989014809.pdfIn PDF document text
    • https://aashianarealty.com/file/vupijademis.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/83790941441.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/56307002087.pdfIn PDF document text
    • https://thaiwoodengames.com/files/upload/files/23908016072.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/vumokijufuxumajuna.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/2bc8e0fedc3662590f16448d4364229a/98727903822.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/17629174d70eaf14ef50065ea91b0f23/63831776416.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/73788776316.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/10656571061.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/10b31202c7aafbee63caf5a347a2bc35/luvadinemiz.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/37303959918.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/en122qcft58a72c1f9r6s8op80/sokitidapole.pdfIn PDF document text
    • https://mygo.com/ckfinder/userfiles/files/44777393279.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c42cc84a9a---73363086746.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/vuzuzojoro.pdfIn PDF document text
    • http://scro.ru/pic/file/74637579722.pdfIn PDF document text
    • http://sb-78.ru/files/file/xisedafodazej.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/39114194190.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/17586654600.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02bf6d44dc---80774279350.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/20423244158.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/608401e39a1355316d786937689cafc5/tojixijamutumubuv.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b2dcb6c4b---87807894447.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612e03399ba3a---nesidufurakenewabas.pdfIn PDF document text
    • 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_off0000d7c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C4 10988 bytes
SHA-256: 57be5711d4d68118944be02536d7ca05a6ab37f9f573c8589ae25424feccdd56
font_01_sfnt_off0000f107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10919 17960 bytes
SHA-256: 94ee14b76ad5444c7e3c5cf45f9019398d88969b8316a1c15438ef022587a43b

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