Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbf38a5726a04250…

MALICIOUS

PDF

82.2 KB Created: 2021-06-27 11:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 04ba05698a7547541ac087f746338d3c SHA-1: 8c7e2c0a2ab777916a846340a52b35fd3755509e SHA-256: bbf38a5726a04250f78fb6cee1a2933df349a94356cd1114947f56c4f7c677d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, directing users to numerous external websites. Several of these links point to compromised WordPress upload directories, suggesting an attempt to distribute malicious content or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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=brent+crude+share+price+today PDF link annotation
    • http://isvpro.com/custom/files/davuferuvigofexegezigug.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/995f97780d0da8ebf547ccdf1d2b414e/xiruges.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bef98784dde---rigamejegi.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/m97jna8mek6kjemq86j8kjlql2/tedaritezetu.pdfIn PDF document text
    • http://delve-cr.com/uploads/80939200773.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/60692928218.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/e0tnpsuacei4kffersoh2247v2/xalefitidazunimi.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/rromodaaqbeash94q7ka5f8v84/99522224524.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/3ff632ff331f6444e335f17ce2615d03/nolagotomagilixonumejokis.pdfIn PDF document text
    • https://activepymes.com/pub/file/17262914866.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985e6c7e84b---pipefu.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c09ce7a20---lakulabebojobotexinof.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16081f0355807c---88505775714.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b543f5e63e6---2151835877.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/6753698001.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/96582885905.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/7dabb6b86173a0cc488e81cd682cea7a/54909091942.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/43552758465.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/8d6pc80scmg5pj13crdrl57sq9/98082235092.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d9f23ae50---53475874041.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ij2m2ekpo4cbkjtp6lknhv9mp0/81450953403.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/31878489408.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_off0000dcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB5 17712 bytes
SHA-256: f61b2a9098bf7a62d2bff5ae77496ac02877c2be6d47b09af45da8c79dc9c988
font_01_sfnt_off00010a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A71 10832 bytes
SHA-256: 0f0e25e0f7292cf4ed94907338e67963488e8aa0ce8a8f349e9d2308832466b2
font_02_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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