Malicious PDF — malware analysis report

Static analysis result for SHA-256 268da97de47c382c…

MALICIOUS

PDF

94.4 KB Created: 2021-08-18 11:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a4615d1759bca57d07c597660111a4ab SHA-1: dbe8de73f9410fe52902533b8467d330f84d2864 SHA-256: 268da97de47c382c634380df4731f306b88222d54570faf04bfaf341a4e058a1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The presence of embedded JavaScript and a lure to enable macros or editing suggests it's designed to execute further malicious code. The document also contains numerous links to potentially compromised WordPress sites, likely serving as a distribution point for malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 8

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/dbf8ec7ca4fe7271057a78bd590cd921/11190398086.pdf In PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/17393769220.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/92344373007.pdfIn PDF document text
    • https://nattasampun.com/upload/files/nekeweromu.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/lulorumejorepekinefo.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160714c0cca7c8---78149455836.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/83100321417.pdfIn PDF document text
    • http://centronegozi.com/public/petosolimipatusidepuw.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b45c2e366a---konupev.pdfIn PDF document text
    • http://greenworx.eu/images/uploads/files/pajuvaj.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e15769fb0---59867887453.pdfIn PDF document text
    • http://uppercanadatwocylinderclub.com/clients/877835/File/fuvajuxasalodinod.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/41756748271.pdfIn PDF document text
    • http://sooclose.eu/upload/File/xesukixorekunibikedugobin.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ecb364603---putinimabotilulave.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/91510230537.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e525128c8---26353533762.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/39207449088.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/88640166530.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc1c2d6c0e---zamubuxezixixonefajaziwo.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/xopeb.pdfIn PDF document text
    • https://grupo.iberia.es/js/ckfinder/userfiles/files/89776336709.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/84ba4d1e4f51c61db7f386c716d33011/50628236673.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=assign+macro+to+button+in+google+sheetsPDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f32d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32D 10900 bytes
SHA-256: caa7d696b355d4f7fb893fd041b3ac7e9dbde32887ded857c472cf0aafdcc387
font_01_sfnt_off00010c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001244c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1244C 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
font_03_sfnt_off0001398d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398D 18084 bytes
SHA-256: 9f769d2ff7e8355c8ffcdfbb40418e987e02f4b7a4c56d5ce851521ba7fa7dae

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