Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3a2e5689d64b83a…

MALICIOUS

PDF

79.9 KB Created: 2021-09-16 22:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 643368160a15bb030c64c3ff58122e89 SHA-1: 4283fad13c620b8a9cd88cad53648630904bb40b SHA-256: d3a2e5689d64b83a502b14c5b36e76bd075cc367b05795260a0d44fb0b5f287c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to redirect users to a network of potentially malicious sites. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://bahamianbrewery.com/ckfinder/userfiles/files/jupoluxojebuto.pdf In PDF document text
    • http://tlw.ro/UserFiles/file/39133976929.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/89699463451.pdfIn PDF document text
    • http://panda-es.tokyo/yamituki-n/uploads/files/37734288819.pdfIn PDF document text
    • http://forumts.com/ckfinder/userfiles/files/nuturimedugorenogigironit.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/fepolenifosusig.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/2a3913cef5389755f4d60cf368891723/guvisawufuviza.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/26731794188.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/pubobisajinexigirimeru.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/betezaz.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/bikinab.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350ca5c5080---30640434214.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/sekupidiparujobojidena.pdfIn PDF document text
    • http://stattus.com/assets/file/kafotono.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/96300179106.pdfIn PDF document text
    • http://careerpathrecruitment.com/swapscan/app/webroot/js/ckfinder/userfiles/files/gabagarali.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/63973212292.pdfIn PDF document text
    • http://kyochonbuenapark.iorderfoods.com/uploads/files/simonojaliponokadarono.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/38015403760.pdfIn PDF document text
    • http://3gr-group.com/ci/userfiles/files/pogotasitibu.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/lemoxut.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/jupibepamegapona.pdfIn PDF document text
    • https://vicareyou.com/userfiles/file/85164733871.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/talapafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=as+a+man+thinketh+audiobook+free+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 11020 bytes
SHA-256: c5720b46e3a6935b8579ee4607229fdb9a7f3e395c0ca6a044b38d3ad8875e5f
font_01_sfnt_off0000ea97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 18064 bytes
SHA-256: 249a060c7236983ba294858efa4a6d41acb7494c0e7d47b9bf71c353c7fd49d9