Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63fa5dc54fdebee…

MALICIOUS

PDF

81.6 KB Created: 2021-09-12 11:16:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2f359f1c1695e0d4843e34ddea5498bc SHA-1: 592e56f41469f295dafb366291c0bbf2e75b5896 SHA-256: e63fa5dc54fdebee42ac97245539e6a4a3e35342f7fbc8d8ea8e2db3a02ca25f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to various domains, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using disposable hosting for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613781d4e764a---lutibaxevajefuxajofeberan.pdf In PDF document text
    • https://epiphanych.com/images/file/xiruxovegewiravuvexa.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/4047028764.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/jizagu.pdfIn PDF document text
    • http://ewtch.com/upload/files/latelomofurizesivebilin.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/28032334891.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/22481294779.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/56064660374.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353789b9932---93680325008.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/miwubuvewe.pdfIn PDF document text
    • http://schturman.ru/files/files/1271528790.pdfIn PDF document text
    • http://timocomputer.cz/files/file/17724913883.pdfIn PDF document text
    • http://net-work.cz/data/file/xiwatafidowutokidideras.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/36037524357.pdfIn PDF document text
    • http://xmzhj.com/UserFiles/file/80958668383.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/kudamamekilubufe.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210906_165656.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/pejelanoz.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/xidokixe.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/mavojanezenenivotinupo.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/38199799496.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/mebavufoxoxonuxepabiv.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/subalisijupav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=free+drum+kits+lmmsPDF 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_off0000d86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 10192 bytes
SHA-256: c21fef2ac3f9a3d05332f568ab900ffb57da063c2a2f9b6acc33580aa02f980d
font_02_sfnt_off00010750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10750 19100 bytes
SHA-256: 30ac637321f3554047d4a055c29084100663cbfce3ecaee7166e4f1176ca0bd7

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