Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d85e5ed52be36e…

MALICIOUS

PDF

70.9 KB Created: 2021-09-24 20:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 26ead45c6311e124b22497bb57928ede SHA-1: 033e81262954cdb594c72c937de6a215deab5a77 SHA-256: f3d85e5ed52be36e16dfede031ccc953d6b68e18123938a210822d13c091d080
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are part of a link farm designed to redirect users to potentially malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, aiming to obscure the true destination or distribute malware. ClamAV detection further supports its malicious classification as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://archism.ru/uplcv?utm_term=jind+meriye+movie+download+720p PDF link annotation
    • http://qunjl.com/userfiles/files/logazuz.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/76205004020.pdfIn PDF document text
    • http://redactron.com/userfiles/file/xafewowobeme.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/zajarurulite.pdfIn PDF document text
    • https://mysmartedu.com/uploadimages/files/valoxudeguzawim.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/jakevixulewekibatezezo.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/66457812057.pdfIn PDF document text
    • https://radio-clipa.ro/userfiles/file/14177400989.pdfIn PDF document text
    • http://fructusartis.com/i/File/luzolizok.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/webeloga.pdfIn PDF document text
    • http://itcck.org/upload/editor/file/10464448763.pdfIn PDF document text
    • https://andana.us/files/files/92890126186.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/161482a8e2b6b6---8941044320.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/fipomuzunagarupagamumi.pdfIn PDF document text
    • https://uangraja.com/contents/files/13481258752.pdfIn PDF document text
    • http://rucodelniza.ru/userfiles/file/xivij.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d7b34fa22---mipag.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/70042732575.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/24914348001.pdfIn PDF document text
    • http://watthaistuttgart.de/userfiles/file/sometafigurisatuva.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/50488351706.pdfIn PDF document text
    • https://onthespothousing.com/userfiles/file/58286141372.pdfIn PDF document text
    • https://projetovm.com/uploads/files/fikedo.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_off0000b298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB298 10836 bytes
SHA-256: 87c7bca7ac74dae8fb5e2c8a6d85c9a0520826faa6df0a7db4b42d3274bd821b
font_01_sfnt_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 16564 bytes
SHA-256: 8676e7146c6d351467688b666214f4810c9418d22ec547d91fafd2e95661552a

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