Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe74cfade97e1cb…

MALICIOUS

PDF

85.5 KB Created: 2021-09-20 01:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3db37dfd2c376f56eb9efe69848af997 SHA-1: 2c0e88c0e5a64bc55a085f7fe03df63a49cdb9b9 SHA-256: ebe74cfade97e1cb45625caea6dd93990c33f91fcebce312c79f431dfd09e577
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the 'link farm' heuristic indicate a strong intent to direct users off-site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://oniceh.ru/uplcv?utm_term=microphone+settings+android+phone PDF link annotation
    • http://vetcasatenovo.it/userfiles/files/tomerusetomumolef.pdfIn PDF document text
    • http://emeat.ru/var/files/jutusodake.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/71784501454.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/71444761617.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/tizolikipanupojo.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/texegutoxidowutu.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/wobevijamuvu.pdfIn PDF document text
    • http://fst-uinsu.net/userfiles/files/lapafuxi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/ami6qq1sc74op8qgkvggsdr973/7553917416.pdfIn PDF document text
    • http://parquet-cortes.fr/data/Files/18176315881.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/lekolapapeb.pdfIn PDF document text
    • https://sujatasfoodopolis.com/ckfinder/userfiles/files/39935502234.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/juxaxu.pdfIn PDF document text
    • https://alwillislifecenter.org/ckfinder/userfiles/files/gelixekumoniso.pdfIn PDF document text
    • https://protum.se/file/7565301485.pdfIn PDF document text
    • https://www.champagne-cornevin.fr/ckfinder/userfiles/files/lebejivewi.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/89487273304.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/78393095212.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/42779510690.pdfIn PDF document text
    • http://apsons.eu/files/file/telutinelexami.pdfIn PDF document text
    • http://vaynhe.com/upload/files/luneje.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/seloguzadilina.pdfIn PDF document text
    • http://thanhnienxp.com/vietkiendo/upload/file/libuwunuvuf.pdfIn PDF document text
    • https://dacola.com/upload/files/29607360256.pdfIn PDF document text
    • https://beautydent.hu/editor_up/66373217875.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_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 17620 bytes
SHA-256: aa06083bcd87c7df92b871fd858b51dc47a10318ddeecd9d6cfe8fccb58a1342
font_02_sfnt_off00012f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8E 10740 bytes
SHA-256: 4f4819e26bf846f6f481600271e98793b4d56c6e3880e77ffd57036a41e9e245

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