Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf4fd2f2208a0e7…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 15:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 68e765488bfd8be045ad4222985db72c SHA-1: a4385a8f0679d5f014fa767afd9af055cad538ba SHA-256: eaf4fd2f2208a0e794b8c19e52b7f4bfd7a684eb8f9fefb0ac27473df9f6803e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for delivering malicious content or redirecting users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs such as https://oniceh.ru/uplcv?utm_term=ppsspp+gold+zip, which is characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://oniceh.ru/uplcv?utm_term=ppsspp+gold+zip PDF link annotation
    • http://robvancampen.nl/userfiles/file/wizuvokalatidewurenet.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/sijemananukefofoxupo.pdfIn PDF document text
    • http://www.hebrewforreadingcomprehension.com/content/82590106884.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/jeboxetuxivigawejenovo.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/mekasipekibutem.pdfIn PDF document text
    • https://pensionradvanice.cz/res/file/tipegixigazobiweso.pdfIn PDF document text
    • http://hightopeducation.com/cms_uploaded/file/pizafadojaterekef.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/nigep.pdfIn PDF document text
    • http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/19815892041.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b791e768bf---92800683900.pdfIn PDF document text
    • http://aurora-c.jp/files/files/93782354975.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/zidukalifizomife.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/gimililapegixola.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/wotexemifori.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161415bf3cad59---kenizurotorepase.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/59430695211.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/90695685621.pdfIn PDF document text
    • https://ckmandarin.com/uploads/jaduzu.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/48419021625.pdfIn PDF document text
    • https://aokman-drive.com/d/files/lalugatirakumuwinixaxe.pdfIn PDF document text
    • https://tenderdiary.com/ckfinder/userfiles/files/fubinofi.pdfIn PDF document text
    • http://turningpointdigital.com/cote_dor_import/admin/ckfinder/userfiles/files/56860178837.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_off0000dc1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1E 18064 bytes
SHA-256: 5b8637f52ca219014d31756116dd757f3466d1b7f662dc4afbc71ee1b6800a3f
font_01_sfnt_off00010ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122F9 10032 bytes
SHA-256: 84e621bd26c43ad38a5f636e8ec80ebb7966c67b71a9e6e645cc66818e32e865

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