Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a2d6ba0198321ab…

MALICIOUS

PDF

71.6 KB Created: 2021-09-12 10:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ede6ff495688c8bc4cb62053e26d1c88 SHA-1: f0d5b1d784b6b5d045551cb5331145ca0399f39c SHA-256: 6a2d6ba0198321abe797203e37124ddb04b75efea6b0bf27cff7e2abf7966aa5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, including one that appears to be a lure for 'roblox hack 2021 apk'. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded JavaScript suggests it may be used to redirect the user or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=roblox+hack+2021+apk PDF link annotation
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/76973501409.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/20410192694.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/41635747167.pdfIn PDF document text
    • https://dreptultau.hotnews.md/upload/userfiles/files/19328994045.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/miwewedulusivef.pdfIn PDF document text
    • https://episcopiaoradiei.ro/files/zefuno.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/59713023135.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/xibaripinisizapijekalazaw.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/zisawefora.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/wevavidobopikutusuwezevof.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/tafedax.pdfIn PDF document text
    • https://univerosg.com/ckfinder/userfiles/files/34891856433.pdfIn PDF document text
    • http://houselandia.ru/files/tobidagimojojumifimujet.pdfIn PDF document text
    • http://lehnerkom.de/images/uploaded/file/muragonofobababiniruxi.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/wekegafuropozowezexopakug.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/ae2b98103fa777aab9568c4241dbfc8e/fejogonurasuwoke.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/66744550321.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/zulokinugiluvulalufov.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/bilulepifirub.pdfIn PDF document text
    • https://vivaldiroberto.com/img/files/mediafiles/file/bejud.pdfIn PDF document text
    • https://rajnnuhiddje.se/userfiles/file/kewemivupuboposibog.pdfIn PDF document text
    • https://12tiga.com/contents/files/49510759740.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/68328632717.pdfIn PDF document text
    • https://konferencii.ru/js/ckfinder/userfiles/files/gufemineguno.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_off0000b804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB804 16184 bytes
SHA-256: ef7394f1417866db577d93dc470d13b802382d09bca4ade7f0a19d27d2f77d66
font_01_sfnt_off0000e148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE148 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 10448 bytes
SHA-256: 18a3d68c10fc5e89c903f1c2c59f0d419a42d260ea798a7d21aa5cb7a1b1c0ad

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