Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce60668b03fb4d74…

MALICIOUS

PDF

83.2 KB Created: 2021-09-18 22:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c7152a5943089b4d4743775dbbab849a SHA-1: 57c81ff7b50947ecc1f883853e7ea3583b5d6fda SHA-256: ce60668b03fb4d742b8fe442eaab4bc1461fd94e6f42377d9e2d08926acbebe1
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on 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 initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/uplcv?utm_term=show+my+wifi+password+apk PDF link annotation
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0050a229d---50918879365.pdfIn PDF document text
    • http://xn--hh0b97d8is16e.com/userData/board/file/pujaromorinujezu.pdfIn PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/71678783948.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/tusaxegepadigev.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/suxemikejolodedi.pdfIn PDF document text
    • http://trustarshida.co/cache/fck_files/file/88656093990.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/nakobemexulelirazobo.pdfIn PDF document text
    • http://ambulatorioveterinariocamali.com/userfiles/files/gakorijokafomamugoxuveno.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/pepasarogonuvepe.pdfIn PDF document text
    • http://santabruna.cl/upload/file/53253126374.pdfIn PDF document text
    • http://pinxedien.net/upload/files/vilaxemawibo.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/bawotalopud.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/64033758537.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/77575473839.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/30481992233.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/82272880961.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/rawixusikibikiwutomo.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/baf20e0756d362dd56906862e2c4e53a/26656608670.pdfIn PDF document text
    • https://konyaalotaksi.com/userfiles/file/82184335267.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/sofabopopifode.pdfIn PDF document text
    • http://www.bash.cl/media/file/nawasarali.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/deturevabisusonelajo.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/66590816820.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/32619187056.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_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 18364 bytes
SHA-256: 6987472282ef540f78ccaa555dda50afcb49c1302a35231830ccea4404d2a9dd
font_01_sfnt_off00010e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E49 10752 bytes
SHA-256: 8191c54b08eb3b47ccb485968ebb13ac84bb31ac96ae2346cd83b60ba4aad2f2
font_02_sfnt_off0001270e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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