Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ed11423a88c94e8…

MALICIOUS

PDF

95.3 KB Created: 2021-09-17 14:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0405397d85d832e6f33d7d7ec709f3de SHA-1: 238fdd53649a8202edb2547fea4806172658c211 SHA-256: 9ed11423a88c94e8bdadbfd071443ebb545526de1e88e4e26f439ab6206ddbf7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous external URLs, many hosted on disposable domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://infrive.ru/uplcv?utm_term=best+journal+apps+for+android PDF link annotation
    • http://optometrystaprzemysl.pl/userfiles/file/vexizasuwagadadilud.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/23797878169.pdfIn PDF document text
    • http://suriyedostlukdernegi.org/image/files/nasinunar.pdfIn PDF document text
    • https://cape-electronics.com/media/file/55454167237.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/bupufumatujudabofufilaxa.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/63648501422.pdfIn PDF document text
    • http://tuzy.pl/Upload/file/sikulosonegemafajusiguxus.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/53265772474.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/wenalironefuresaxumewu.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/4ecbe07ef4e5a501044b6f0294e10f7d/45024141058.pdfIn PDF document text
    • http://dglytbt.com/upfolder/e/files/20210909231815.pdfIn PDF document text
    • https://orcasproje.com/userfiles/file/41603058278.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/diminuziwisefodojuxe.pdfIn PDF document text
    • https://chowdhurytourism.com/ckfinder/userfiles/files/kafaji.pdfIn PDF document text
    • http://www.cenlafilm.com/siteuploads/editorimg/file/tedububutixod.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/rudisebapanefejap.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/95327580877.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/18646766758.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/18421464508.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/gojigolotupolatoni.pdfIn PDF document text
    • http://domgr11.ru/uploads/files/53520544373.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16131a47e6ab9f---rukigabunikusazol.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/73529988442.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_off00010f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001274e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274E 18252 bytes
SHA-256: 4b48c1d5e1663d42cd2d749ef0a25870eadbf4715754d681c3f719dabdb6bd80
font_02_sfnt_off0001569c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569C 10772 bytes
SHA-256: 1818c4b76a438618f06dfc52035e565e9c597603f757dc005f13c5d64bcfa257

Open this report in the interactive analyzer, or submit your own file for analysis.