Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed217892452f2a9d…

MALICIOUS

PDF

81.9 KB Created: 2021-09-08 20:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 6ce56633e2b7b747fe822f6fcda943be SHA-1: e0598f55033ae85cbe13d4f4be91e738f8d0653d SHA-256: ed217892452f2a9dd97ac1a48cfa5d3a4a3e23c3e5d67f25fdb8ed5a58eaea2f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript suggests an attempt to execute code or redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://sartoriaventurini.com/userfiles/files/zawowenavo.pdf In PDF document text
    • http://podiummoda.ru/userfiles/file/58781473639.pdfIn PDF document text
    • http://iact2001.com/userData/board/file/24913123915.pdfIn PDF document text
    • https://basisangka.com/contents/files/69824803555.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/janigukibewames.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/xijurewexozorejaker.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/70454257404.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/vafididijonukemuzebebekub.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/pezigomatomotiwozigiso.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/dadatis.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/32167932408.pdfIn PDF document text
    • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/nudapitanipevovupowomud.pdfIn PDF document text
    • https://codefon.hu/js/ckfinder/userfiles/files/48133625717.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/fujanekuvukederufibaril.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/wutobusad.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/fawevewusajigekenop.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/62075461040.pdfIn PDF document text
    • http://westhollywood.ilovepokebar.com/uploads/files/42646585893.pdfIn PDF document text
    • http://edallyshop.com/upload/files/fegokekavopekegilo.pdfIn PDF document text
    • http://huemin.com/fckeditor/userfiles/file/25970110116.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/kusujafekaril.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/45459224159.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=safety+topic+manual+handlingPDF 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_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 11088 bytes
SHA-256: 6e3020bcb01a53f845c2c58d0ed40719d0bdee7f3d8c2cff9ffd6245e5f7052d
font_01_sfnt_off0000f47a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47A 17716 bytes
SHA-256: e5a8cd31bbe3cf643b2900844802e739fcf2a655867bb6bb3f8d55c6a0f48e23
font_02_sfnt_off00012226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12226 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1