Malicious PDF — malware analysis report

Static analysis result for SHA-256 54eda2a885a0695d…

MALICIOUS

PDF

69.5 KB Created: 2021-09-25 02:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 634b11531768989a38df7c713a0c4a3a SHA-1: bf8d52577e2f1a463804c6bc987e347bc03ae5f1 SHA-256: 54eda2a885a0695da9caa34dd3eddaac9b5c5ea8cc4297d625206a24bbfeb8bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs pointing to external sites, suggesting it acts as a lure for phishing or to download further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, reinforcing the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 http://csc-027.com/userfiles/file/20210925062707_y80vf4.pdf In PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210914_A366EAFA15B234BB.pdfIn PDF document text
    • https://raljob.com/userfiles/file/18097923438.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/kudijimiridoritipog.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///61745450818.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/fovudu.pdfIn PDF document text
    • https://e-midas.ro/files/file/gemofugoripezikuvifufivul.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/nisezupegojaw.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613029bdc3075---napazabobevikigadigewejil.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/bekofakipusafaxivumeju.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/91216755293.pdfIn PDF document text
    • http://bamor.org/userfiles/file/kerat.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/tizomobe.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/jujijekomazexadunijokamet.pdfIn PDF document text
    • http://travellerisland.com/files/72669309831.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/jovubiluze.pdfIn PDF document text
    • https://vleek.com/uploads/files/5867991640.pdfIn PDF document text
    • http://gptools.net/userfiles/file/83191827599.pdfIn PDF document text
    • https://sonerofset.com/userfiles/file/tonegani.pdfIn PDF document text
    • http://quangphong.vn/uploads/image/files/54751410723.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/90076338631.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f74c14452---47116874064.pdfIn PDF document text
    • http://rotarycochinharbour.org/ci/userfiles/files/49442636748.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=kali+linux+apk+no+rootPDF link annotation
    • 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_off0000ad7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC591 16428 bytes
SHA-256: 9055f5da3ab96202a41b13820fdf4c095760895c956dc6a25e125aac14da32cb
font_02_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 10232 bytes
SHA-256: 92bcd62d4bb5fa27a369e4299a2e3f633d68236138dfcbae5c239d87d9efbda5

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