Malicious PDF — malware analysis report

Static analysis result for SHA-256 386ec29751fcabe5…

MALICIOUS

PDF

117.7 KB Created: 2021-06-25 13:11:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfe85b1f9b65d1decf4ec27f29c89773 SHA-1: fa71f2381b70bb0f6e0084bd6cd0dad7f14c9549 SHA-256: 386ec29751fcabe52b883b50f6b2c5ed9bb3fabc3e419838bc1de8840e6d8378
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This pattern suggests a link farm designed to distribute malicious content, likely phishing lures or further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c360cdec313---tupajekimisigapodigig.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/7d228924d6f2d4afc9ca2940a00780d6/34340838212.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608416a0c20ca---1062782430.pdf
    • https://shellserva.nl/docs/Image/file/54620953544.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/3667238989.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6b67c1125---53388824554.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac61da965---30656039644.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/61b8facd0e83d3d48d93336575d1f430/kurodawowaxaxoruxepuw.pdf
    • http://sl-light.ru/design/img/upload/file/81580697138.pdf
    • http://jun-travel.com/userfiles/file/65469063991.pdf
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/ba9c483e9b530626fced7195bc3e6fd3/bulegumuvoti.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097189f2d76f---14107826392.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16086395b032ee---28094983839.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8aede8cf---76474755737.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cacf3ea188---33564625477.pdf
    • https://thefencedocumentary.com/adminfiles/file/16933012683.pdf
    • https://istocdukkan.com/userfiles/files/84084655905.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=second+wave+of+feminism+timeline
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001686e.bin
bf9e7b206c0dd6065a003579b9200861bc3011334c28f3e7234c304faf15c067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1686E 10764 bytes
font_01_sfnt_off00018144.bin
78e4ba4b6145be6cc775706bd0296280d62d72e1c4d9417f4e40cb3a3adfa693		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18144 18724 bytes
font_02_sfnt_off0001b218.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B218 16792 bytes

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