Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0cfc6945953082…

MALICIOUS

PDF

87.5 KB Created: 2021-07-08 03:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17551b5253c65755b00e8f6699b474dc SHA-1: c0e353958a9d5c44de463fd9e2bb0d352e38205c SHA-256: be0cfc694595308254dba476590bffce8a02b29cbd72315eccaa3e9b0598d9f0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised websites, indicating a link farm designed to redirect users. ClamAV detected this as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The primary attack pattern involves luring users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://drafthe.ru/uplcv?utm_term=the+girl+with+all+the+gifts+book+pdf
    • http://csc0535.com/userfiles/file/20210630150418_ghpkep.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/b1516de860eb31d32133d733588b0c88/22493309066.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609698289d9bb---najidumozosifipotomu.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/mezadonofup.pdf
    • http://bisenzia.it/userfiles/files/92718184415.pdf
    • http://tms-operation.com/upload/files/nozilezosojirujoxi.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a251d9604c4---sapaxojitekofidunumexatu.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607284114f694---65219461609.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/htj51q3j3ouq507i28q4a0s51j/30246400772.pdf
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/8b45b0c5e844a58c83d02018647a1621/88736986763.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/jrdiugmf0uaoio1bothnimasiq/povevuvedilufifakega.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/1648a572da1815c2776b611c4a805487/zipixoripaxapib.pdf
    • http://agnieszkapawlik.com/userfiles/file/tevibopelotewenu.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd8585ad05---16329192130.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8ca09da83---33320935435.pdf
    • https://biothiennam.com/media/ftp/file/viluxudo.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd1e3832f4---43915766158.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869c65d2f38---8462045643.pdf
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/52e5c5761aa5148667f285e5dd1afc46/82644123455.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/3d6384931ce4e73322d0acb4ddb3f814/98304202412.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa85ceb9e3c---64511891328.pdf
    • https://retta-bg.com/userfiles/nugapokufofaxabutujobulok.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/c5f99a6bf2e5ae872d6f562cc312c643/tigibetopode.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2418d5d3d---29337770406.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f47e49bd37---18923288635.pdf
    • 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_off0000f3c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 16792 bytes
font_01_sfnt_off00010bda.bin
a8afd22800b83b6264a22812f235c4d9c6e0c2a816f4f2a40fad005202ea68dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDA 10952 bytes
font_02_sfnt_off00012508.bin
02bd282b89c75a7593f5afc9b0403b36df99b8d4736ba81272dd4f78e2be7798
pdf-font-stream PDF embedded font (sfnt) at offset 0x12508 16788 bytes