Malicious PDF — malware analysis report

Static analysis result for SHA-256 79642257d43ed881…

MALICIOUS

PDF

70.3 KB Created: 2021-09-12 08:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fee9c62f1bd478a14b29ce3e8ae37a41 SHA-1: 04aa16d3e78970eb8cc7716cf165ad4c8a001f05 SHA-256: 79642257d43ed881fcd544e8dc620153fe8d5112610681c1fde14c739d467b56
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the structure and embedded links suggest a phishing or malware distribution attempt, likely using a lure like 'gta vice city download'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=gta+vice+city+download+for+apk PDF link annotation
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/kemuw.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/tunizedubabixuvufoluwok.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/jaribiwupuwip.pdfIn PDF document text
    • http://35ju.21tg.cn/uploadfile/ckeditor/files/vugevi.pdfIn PDF document text
    • http://dyneco.kr/userData/board/file/42746857254.pdfIn PDF document text
    • http://mobitransjogja.com/files/betujagegetudobemewe.pdfIn PDF document text
    • http://mertcelikkapi.com/userfiles/file/22203554360.pdfIn PDF document text
    • https://hirurgija.me/files/metazojeluvowavidapuworab.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/71995684186.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/momitexixodavifejafebeken.pdfIn PDF document text
    • http://solarissoft.com/img/userfiles/files/87586332159.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613179f3ead22---vuwibokikonamasip.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/xaluxovewuwegilivobabijef.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/vorijuw.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/75247354112.pdfIn PDF document text
    • https://jck.ro/userfiles/file/merofajadejetewibaz.pdfIn PDF document text
    • http://mengnuanua.com/app/webroot/files/files/36901371545.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/zexeluw.pdfIn PDF document text
    • http://hutnia.pl/userfiles/file/2183706042.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/85079741345.pdfIn PDF document text
    • http://jiab.net/userData/board/file/9947345818.pdfIn PDF document text
    • http://king-pro.com/userfiles/files/sogenikajodowanapul.pdfIn PDF document text
    • http://arablift.net/userfiles/file/gogarejenebolakaforoge.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/lezunelaxajum.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_off0000b22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB22E 10840 bytes
SHA-256: f78ad69659a6affb84fc2922369a4f3268412962b24952db0101948fd7ae5260
font_01_sfnt_off0000cb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB71 15800 bytes
SHA-256: 2f20f460fe8405103b887f73f1f46566dc83a892fffc3db6879e1bddae405ff1
font_02_sfnt_off0000f3ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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