Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36eaf20a6fd946e…

MALICIOUS

PDF

69.3 KB Created: 2021-09-28 02:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 17c908dff23bd4593a707e2878513cae SHA-1: f112cc91eed9b1c9febd63d88bf15968116d4bac SHA-256: e36eaf20a6fd946e6fd45eb1c74673238c753d379bbf393b13100e69ef5a06b9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are likely part of a link farm designed to obscure the final destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, aiming to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16143e6b23cd94---solupe.pdf In PDF document text
    • https://piphoto.tw/uploads/files/202109042318459202.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/751492f0f00fad31153a5ddd7a955a46/94248387315.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/falowefimozanexamekogup.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/tatadegajepu.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/pemuvovukudiwivinedor.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/49209743767.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/gezugelodafafiseno.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/subevaluminomofiji.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/66909613829.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/minovidoxe.pdfIn PDF document text
    • http://vrzion.com/data/userfiles/files/65486237143.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/rovidaf.pdfIn PDF document text
    • http://le383.com/uploads/files/74435568371.pdfIn PDF document text
    • https://aluvioneschicamocha.sinecsas.com/ckfinder/userfiles/files/jowotezebifenukimarefexip.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/zoxesozumakebebupujo.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/71656493045.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/57864178003.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/bivesifibigezapuzelulova.pdfIn PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/bojomudipefivefadum.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/lomodefevasura.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/kimamezakifol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=check+different+hairstyles+on+my+facePDF 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_off0000ae4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4C 15948 bytes
SHA-256: 2b31660e620b9ec31d1a4fa0c95278160124ef9b51fad44bcce2767c7bedaae0
font_01_sfnt_off0000d64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 10976 bytes
SHA-256: 9ad2486c04c638bb7934b5104c630e8caef72071e3733d00199c22b88efeed7a

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