Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e616a6ab405b1be…

MALICIOUS

PDF

80.8 KB Created: 2021-07-03 06:09:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4588f88842683d3c916e755473a42790 SHA-1: 05beaad2775b62d1b32c6020424c2b0140065866 SHA-256: 6e616a6ab405b1be846928d01fd2387f7c54adaad237cd3596543ffbc7b02326
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript and a large number of external links, many of which point to compromised CMS upload directories or disposable hosting. The ClamAV detection indicates this is a phishing trojan, likely designed to redirect users to malicious sites or download further payloads. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier clean score 0.0079

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://smidgel.ru/uplcv?utm_term=a+gaseous+hydrocarbon+gives+upon PDF link annotation
    • http://boathousebrokerage.com/userfiles/file/29083651522.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/2021652221366500.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e993bcb891---xixefoxuwofedigidub.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/34350528825.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/q55e5j010343gkigfobbrqh3q5/11493975795.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/wetufowedixo.pdfIn PDF document text
    • http://landpas.pl/upload/file/mazilavix.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090539abd6ec---saxibekudejifo.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cbc6f8195b2---nifotozidugawogupita.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16081d26b0a178---30873751892.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9c79e2b63---41465070582.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/0faaf90e914e843d708be07bf6c59cb4/warimij.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/ea24ea086f9df7d192ff2c6aa7bee1d8/vujitejamovudomatedalab.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d63406f30b8---45039647101.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/57260882452.pdfIn PDF document text
    • http://canoeing.by/pics/files/gobetekusekoxiluzibidedef.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a858173f0d1---nowuzejoxoniwakile.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/7a8670f6279f3d18c1bcadf6cc432430/79201913850.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/rupujumadu.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/99228567692.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609a09f622557---kixegijiromagevatakikavap.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/12847066926.pdfIn PDF document text
    • http://nensi.si/upload/file/vazufa.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3dedb0af---70649543939.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/347c54bd201882014a2382ff476b524c/12210911655.pdfIn PDF document text
    • http://dges.in/userfiles/file/miwuxekigofoxubanojunifo.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fe81d9267---55928600363.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b97985de1a7---sokudumodonifogefo.pdfIn 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_off0000daf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF1 19572 bytes
SHA-256: b28d4311f4ab3252102fcc5b7834b2561a76236bde1183af447f4827a6142f8c
font_01_sfnt_off00010d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D31 11048 bytes
SHA-256: a6eed82f72b5eeda5446f5176aad5537a9e30b33b6ecb805a333aa9ce663c167
font_02_sfnt_off0001267e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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