Malicious PDF — malware analysis report

Static analysis result for SHA-256 fabdcc1669f19485…

MALICIOUS

PDF

87.3 KB Created: 2021-07-02 07:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcf0660a7eab40e497b87b1c4205d242 SHA-1: 6ea4bbc51135cacd3982f9ab07c751e0bbf63808 SHA-256: fabdcc1669f194854be63a613ca34da3f0b60b330f8245d0c4ca195f6b25f39a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload plugin directories. These links likely serve as a distribution point for further malicious content, such as phishing pages or malware. The ClamAV detection and ML classifier strongly indicate malicious intent, aligning with a phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b74bce46807---2795060084.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/tc09cap1rshdgsnqk57voavckr/xepig.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081192aae9ec---malinaratimovewuvo.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608496b6c1b4f---55993457003.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/820b73f1d045e4abb84289150779c2da/28182128585.pdf
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/700c502fb05a721b8cd455d0a5549943/wuvijutubudilap.pdf
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d732da4f3b---67904969573.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3507afa48---golarikanolosibojoju.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be7dec08fd---77142602297.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/c778c556bac2175e1e11980479e7da39/62752302996.pdf
    • http://stardentalcare.org/userfiles/file/mobiz.pdf
    • http://whalesart.com/uploadfile/file///2021061014472735.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac49ebef4f8---22509846405.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/62494643750.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607189f003031---wodeturuj.pdf
    • https://dangeloremodeling.com/nbloom/fckuploads/file/wixojimizi.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/r547ssd7tu4v1vb13i70pvfkq1/gaguwi.pdf
    • http://ahkjt.com/upfile/file/jenepipil.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160820c05d86aa---68088983890.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0989d56bb---xuzisedomo.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/aba39713b190506000fc33dd85e8220d/fokuruwoduvesajor.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16090e5b186dea---63303453647.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2baa967d03---fitofe.pdf
    • http://cmepta.com/clients/7/74/74ea2f63c40943e6497cbf70acaf7c81/File/91569726250.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/20ff72c6c866537f50204d33b3008fa9/75029948674.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/f8756d240c307bcd076704218aa7b573/2824007744.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=houseboats+for+sale+lake+mead
    • 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_off0000f2da.bin
28626047d700bad137dd1784be9f3979c739a6b09b591a90b731b633e4985bbe
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DA 16924 bytes
font_01_sfnt_off00011f32.bin
abb3ddb33228881fb382f111ef64b2fc6c8cd2939f876c3072a7dc3c331e82bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F32 10644 bytes
font_02_sfnt_off000137a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x137A6 16792 bytes