Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47ceac2c202b7ab…

MALICIOUS

PDF

70.5 KB Created: 2021-09-19 12:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 840cc46f65aa3b0cf50d89b79aaef4c9 SHA-1: abcce0c1d9538fb4e2ebf38640bc70f95d47b66d SHA-256: b47ceac2c202b7ab7cc5a0b3f1f3b5df10354bd98b6fee3d57452b1446e24cb2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic firings suggest it functions as a link farm, directing users to numerous external URLs, one of which is associated with a FIFA 2020 download lure. The presence of embedded URLs and the nature of the link farm indicate an attempt to exploit users through deceptive content, likely leading to malware download or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • 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.
  • 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://crewmak.ru/uplcv?utm_term=fifa+2020+offline+android PDF link annotation
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/ribuwipimajad.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/b9b4b22d498652f597bbfc6e9308ea2c/zavexewajugipepo.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/53814970036.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/41489255486.pdfIn PDF document text
    • https://hunglivet.com/uploads/files/202109171937258307.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021091518483429.pdfIn PDF document text
    • https://sunriseinnjasper.com/nbloom/fckuploads/file/gabaxojetojek.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/gomogefu.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/54727980153.pdfIn PDF document text
    • http://vip-cond.ru/userfiles/file/70871880020.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/sowepapugagadimegutub.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/55241499433.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/60673626464.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/mazebopivetosidonisubezo.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/xabikuzajuxuwatu.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/metinulagadojepuma.pdfIn PDF document text
    • http://thekreativecompany.com/uploaded_files/userfiles/files/wonagejizadagalosubov.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/84578158696.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/mefakavuvozakabolu.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/zovuwevokiwekasorufepiju.pdfIn PDF document text
    • http://saaretravel.ee/images/file/65509736126.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/26712778265.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/16169418284.pdfIn PDF document text
    • http://cobmedia.hu/include/sojipojebu.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210910054525517845ws67d56fsb9p.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/xojunuk.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_off0000b4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD5 15800 bytes
SHA-256: cfcf36a1875464250d24d6b140127bb041e84de2f2e5f090e9fdb3c409861efc
font_02_sfnt_off0000f539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF539 10300 bytes
SHA-256: 79fc7b8f9257106b020f9decd3767017b35a03128b15fad7e03d03cf42d701af