Malicious PDF — malware analysis report

Static analysis result for SHA-256 917a46c24c21cec0…

MALICIOUS

PDF

73.0 KB Created: 2021-09-20 00:31:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9fad0e7fdb951a2b2fdbabfa05ed9b60 SHA-1: 684a88f616de08886816ccbe24320e97d6686dd7 SHA-256: 917a46c24c21cec0a1341f4fdc7d767fce8b3c803ad4f7737cfd87d93525009b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm designed to redirect users. The presence of these deceptive links suggests an attempt to trick users into visiting malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b2cae893e---34526676893.pdf In PDF document text
    • http://physio-praxismitte.de/userfiles/29618950990.pdfIn PDF document text
    • http://vanhacollection.com/images/files/gujixaburabatalarixoti.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/vajonipevixopomodusikiku.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fce7ddb927---12375608769.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/matarujubirufoki.pdfIn PDF document text
    • https://wasael.com/userfiles/file/2040028214.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/niduguwa.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/wudotabaloguxuf.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/62022272436.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/jusurewizisimalunolivug.pdfIn PDF document text
    • http://www.diplomat2014.ru/ckfinder/userfiles/files/80700336993.pdfIn PDF document text
    • https://giridhareye.org/ckfinder/userfiles/files/6801304772.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/75456285119.pdfIn PDF document text
    • http://axwelindia.com/uploads/sumoxobixewuvowuga.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/3839426401.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/25789584966.pdfIn PDF document text
    • https://wmu24.ru/media/file/likapokagodowopidige.pdfIn PDF document text
    • https://blagoustroystvo24.ru/ckfinder/userfiles/files/66540305182.pdfIn PDF document text
    • http://seasonmediagroup.com/pic/file/76259002599.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/wuvidulakabapisatujuwelu.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/70159420544.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/49159886674.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/vepubakavulasifefowukiwak.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/39663399245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=dragon+ball+xenoverse+2+mobile+apkPDF 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_off0000bc51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD463 15800 bytes
SHA-256: 701d23d276dbac44fcb99a653b0437317faa799169a158c27cd91a472f06059b
font_02_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 11016 bytes
SHA-256: 6cca4fa1704a781ab5251f86a028fed311a5fd84fc9217104145107620d972fa