Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bbd1a5c83a5052…

MALICIOUS

PDF

71.7 KB Created: 2021-09-27 03:00:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d5b86e63d3a53a83de93b7d42afbe706 SHA-1: 2ee634590bebb5bd66e36e825068a2e6ad0a6226 SHA-256: 94bbd1a5c83a505265906bc48ba27fd0af27723d5b798a0c524c1fc3edbf6a2b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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://smidgel.ru/uplcv?utm_term=will+android+tv+work+with+iphone PDF link annotation
    • http://jmvlpslimited.com/ci/userfiles/files/sisuzibeliw.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/99983757299.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/gofowukelorik.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/migajibutugekowax.pdfIn PDF document text
    • https://clubkdo.fr/img/pics/files/85108770336.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/jaxurabilasutu.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/23475224832.pdfIn PDF document text
    • https://dom4m.de/userfiles/files/62834826830.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614137c889e6e---42412137552.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/jenarizetixituvadij.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613eea3155065---fasitesilezugofefepemefu.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/84804405938.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/18636037098.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/sawepobirixerad.pdfIn PDF document text
    • https://agatanorek.com/files/file/samomiw.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/577e891f42fc7c1c8249b0f23575f3d8/72197628056.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/sigebunatonuriniganikige.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/gosizupaxorikilupexovira.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/65281666847.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/xizevasalijupodom.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/povufusip.pdfIn PDF document text
    • https://rgcsmt.org/ckfinder/userfiles/files/54082191148.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/duvijapi.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_off0000b365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB365 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB7C 10556 bytes
SHA-256: a31758c134b5b97ea8fe9627a85741cfb7ddfb5197cbce46358cf961ba20a8ff
font_02_sfnt_off0000e379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE379 18304 bytes
SHA-256: 04afdf4bb4f25047a007aa24de80d74c1443d2b4ad06190118371464448b25da

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