Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee96f42feb408c5…

MALICIOUS

PDF

68.1 KB Created: 2021-08-05 06:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 205b65c036ad1e9215ca689fe197636c SHA-1: ce06c2e7ba02935d126df215da8422e2c0cbb9ad SHA-256: 4ee96f42feb408c5619fb5c4ce2bc6e268b2ad23e0c5389c9c08d29105178894
94 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting. The ML classifier also flagged this PDF as malicious. The primary function appears to be acting as a link farm, potentially leading users to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7912

Heuristics 4

  • 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://wastran.ru/uplcv?utm_term=how+to+do+lymphatic+drainage+massage+after+liposuction PDF link annotation
    • http://klinok-saintp.ru/files/94230729541.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b419728bd36---kesewomomegim.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/bixajipi.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/xozitezu.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210621_84260D632DE73AC7.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/tewulofulili.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba3ef355a9---11952238268.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092890c27d4f---76896819420.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5546ffddbd238f96615ee0e9e4368525/lodijurulededimuz.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/1gb6difj45hv1jbue03pthna9n/rebejarijaxenofeloxudef.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c09eb3e8af---gijiwutikozubopugov.pdfIn PDF document text
    • http://ahchala.com/img/file/kizuvafegujofigezobisadu.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e773ee24a---74189668233.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/73622712955.pdfIn PDF document text
    • http://www.lnk-creation.fr/upload/file/guzilemevuwefapubuwug.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/sipufevowosemaduwosojo.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/a61360a7b269f25f14f9b46517f39aaf/30148635649.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/28250647171.pdfIn PDF document text
    • https://slide-bearing.com/d/files/vuwobefurubemobikipe.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab88ce1fb---45968029936.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_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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