Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bba499da6fb84fb…

MALICIOUS

PDF

71.8 KB Created: 2021-09-27 09:26:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 94670eeaea7cba12436698017491c336 SHA-1: 0a54642f4b1b06cf55d98afc39c40cb7cd62b001 SHA-256: 9bba499da6fb84fbbf8450ccb736671928f67d04751fa4edb1eb85482a88ebe9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicate that the document is designed as a link farm, likely to distribute phishing content or malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • 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://archism.ru/uplcv?utm_term=popcorn+time+android+app+free+download PDF link annotation
    • http://verduciautodemolizioni.it/userfiles/file/89991881099.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/sopivikawitu.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/ce0594cb8ad597c8cc8ef9695d8717ef/70203349004.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/a28def6687faf72c70ddec036dc3cd75/xobabalikokosatan.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/gafitazulukujapuvulujon.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613aca2851c0c---gonujisivodagoluvawi.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/61118781208.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xudukotaduga.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/pojinolajomukenoluxazude.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/banenimasiponag.pdfIn PDF document text
    • https://ganganagardentist.com/userfiles/file/63809373791.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/96330398368.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/b66169bd542cbe8870f3c7b1777781ac/93564756959.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/meduganiwodetu.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/33372078036.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents/files/rawiwizukijodewenob.pdfIn PDF document text
    • https://digitaluzaktanegitim.com/calisma2/files/uploads/tafumanix.pdfIn PDF document text
    • http://revucue.com/ckfinder/userfiles/files/97501489449.pdfIn PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/91557981415.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/77590858016.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/sivanifokeporoliturobenuw.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136218363b5b---juxobiroloruboluxul.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/161501d9ba5036---kadewizajetusozi.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/mofodonibedavowakiduwus.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/79874113340.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_off0000b4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D9 16544 bytes
SHA-256: 4f1047c31812b54781be496aaa7ae61325128dab698933d4e56543334c39625a
font_01_sfnt_off0000de9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B1 10700 bytes
SHA-256: a0a8284f9da281f0d6d4eee1861f3ee32cacb6cc42a8ab757a79dfcdf180d660