Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89ee97acf35d17e…

MALICIOUS

PDF

88.5 KB Created: 2021-06-28 12:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a6634916f01c95fe0544f26a9320f7b SHA-1: 12bfbd7fcf2b14216b47ce091d3bc6b87c384a27 SHA-256: d89ee97acf35d17e1da8e0d9870a79488906c2e59591cfd5d746c99cb67e3cdf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, containing numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. These links are likely intended to redirect users to malicious sites for further exploitation.

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 http://files.ibiza-ferien.de/file/kepedufima.pdf
    • http://sanruou.com/app/webroot/uploads/files/33297239108.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/823e45f6a9d780c61d2f9507a57e5dc7/49304725067.pdf
    • http://kapsalonindex.nl/images/uploads/54083172369.pdf
    • http://mvdeastudio.it/userfiles/files/89888320217.pdf
    • https://capecoralliving.com/media/file/zigarexurapuxuwa.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d9246e5bd5b---15496889417.pdf
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16221100502802.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/5elg4icm2s3afmrkp0ubnbuv8b/32000910931.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b80d84d172---fodemivituwamo.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160879840980f0---66881722814.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c9529185f---64914209195.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/31ac55af5f6cc32228c221a490f1663c/41046975251.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc44b45ac58---sazalewu.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5d1212446dd7a05d3ea934374cc4fdc0/xedipi.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865417277b9---25051439196.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a334c9951---67020922247.pdf
    • https://irantruck.ir/data/file/janomejo.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c195042e58f---97171581553.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/20027526401.pdf
    • https://airflow-skateboards.com/upload/file/tupevijufifujopadoleluza.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083c31502827---katuvobab.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/ab31fb717fcdd1c0fe64889d607acfd1/92317700631.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/6260e1b3dd0a20045128a99316c62b99/sukefodatujugoboxod.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=designs+for+houses+in+minecraft
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ced5d2935---wupulijabipubakadowipizoj.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_off0000f5af.bin
ca1537ec31ea8360235c42a40c8ab9dcbb4ed300e02488b299522a8909034c29
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AF 17856 bytes
font_01_sfnt_off000123dc.bin
868635569d5f9981f2b704a3889a94be18178823909381f0cec870bf6cdf8e19
pdf-font-stream PDF embedded font (sfnt) at offset 0x123DC 10836 bytes
font_02_sfnt_off00013cc0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC0 16792 bytes