Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce8396ce9110f1c…

MALICIOUS

PDF

74.5 KB Created: 2021-09-20 08:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4b40eac42f45aaecd01b4163a296cce8 SHA-1: e4abdc7eb3000ecabef2842a94f5728abab92eb5 SHA-256: fce8396ce9110f1cf80f541dd8ab2882760c3a942836400422b69ab9e8001119
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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://allytemp.ru/uplcv?utm_term=need+for+speed+world+offline+server PDF link annotation
    • http://elturo.ru/img/upload/files/44182726174.pdfIn PDF document text
    • https://mihalex.by/files/files/32850388611.pdfIn PDF document text
    • https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/63677695785.pdfIn PDF document text
    • http://ippon.lv/uploads/File/gipakijonovajuwuxamo.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/voxikeradanovupelob.pdfIn PDF document text
    • http://c2ctrading.org/cms_upload/files/kurakupubufopuv.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/98087646779.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/pukisuz.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/nadimutiweporumajod.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143567d63e7e---25613772580.pdfIn PDF document text
    • http://cgpharma.in/cote_dor_import/admin/ckfinder/userfiles/files/tenumamenoma.pdfIn PDF document text
    • https://luxurybaths.marblobaths.ph/app/webroot/img/files/lakonugijewilorawumovuja.pdfIn PDF document text
    • https://globaldreamindia.com/webcms/file/wumoxurafefu.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/56234066384.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/92743136991.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/wetaxepegipepunuguwo.pdfIn PDF document text
    • http://podarox.ru/public/files/63429253580.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/xavibogidaxal.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/8437879021.pdfIn PDF document text
    • https://wineuniverse.us/userfiles/file/59828543940.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/4c83c2e81de46343afb5bc7b174fa68d/kafoxajojana.pdfIn PDF document text
    • http://seksdagen.nl/userfiles/file/17147605538.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/tumuxuvuzopejexefufuna.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_off0000b9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E8 10360 bytes
SHA-256: f39bd7a19c82b51116a15adc9c214da5ac15d2dac32377d5d56b019dba49a018
font_02_sfnt_off0000e969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE969 19820 bytes
SHA-256: a31621d9cb826af742222d2fdefea5a03bc00be11c2d3b71c47e76b54708cc35

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