Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0df2a1f1a1c8c18…

MALICIOUS

PDF

85.4 KB Created: 2021-09-01 07:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9c9c76340aec3fa6ef92aa1239dbaaf2 SHA-1: 0e19d910a7c27adffef6c476b9db8849757b852e SHA-256: c0df2a1f1a1c8c185a5cdccbd0a5be0eeb67d473163ec8b045c5dca2d31ba11b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress upload directories. These links likely serve as a link farm to redirect users to malicious sites, potentially for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=tongue+bitter+taste+in+mouth PDF link annotation
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee91ff9f675---fojar.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/zezolosazafa.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/67970f888a28d5495194d17db8508641/15185155616.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/buwivafobevumowajul.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/50819033589.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c38acebea90---gezoxisapilofokumasoxo.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/43360965779.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608f3a039d305---35831441773.pdfIn PDF document text
    • https://fiscalonline.ro/app/webroot/files/userfiles/files/7556521128.pdfIn PDF document text
    • http://conservativista.com/js/ckfinder/userfiles/files/xajozebivemefafoxa.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/7d2189f5e18dd117f2dd82aff208fb60/90282797332.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/87826811609.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f85dc68e286---faditikapukugetulifik.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/maxuzisizekilironine.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/wapolonurewewuto.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa4d710234---benesujajivibikolixupe.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c4566608aae---77544763947.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/lanezokupaxetog.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec100222be---75255515084.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/0482bb24592f36a38860dd75d581638e/fapoguzireboxorejubadumug.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c6f22cdf2---dudodapatidogumimexu.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/38639093888.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/41732223604.pdfIn PDF document text
    • http://belloverde.net/emailer/file/gifikem.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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 18332 bytes
SHA-256: 381e463a20094539fafb655cb79ef6cefed58ca56b3e192f9844b7eff365dfe2
font_02_sfnt_off00012e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E7E 10712 bytes
SHA-256: 1471792d4845109fe06814ce4a64b740ab64317b7570a299df433f29c045d5fb

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