Malicious PDF — malware analysis report

Static analysis result for SHA-256 e295d6ef97c3cc9b…

MALICIOUS

PDF

69.9 KB Created: 2021-09-27 05:47:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8d8aeef76c72c638d102293618a6408c SHA-1: f608716a709923f5ee1528ba4e0507326a887664 SHA-256: e295d6ef97c3cc9be0af022d48833c055161293975e0462e37c6b10268a13cda
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were extracted, the presence of external URIs and the link farm heuristic suggest the document's purpose is to redirect users to potentially harmful content or for SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://grgct.com/ckfinder/userfiles/files/zarexuvibuzi.pdf In PDF document text
    • http://geo-equipe.it/userfiles/files/18690478337.pdfIn PDF document text
    • http://galenbio.com/images/upload/file/bisifizuda.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/36479395021.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/pofaxajotaderobodibuzukuf.pdfIn PDF document text
    • http://bastola.org/userfiles/file/doretonuvepukali.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/vugofadibigam.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/pevit.pdfIn PDF document text
    • https://millinerandassoc.com/files/file/75764380717.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613a90cbcc2d8---nepudifazugutakip.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/91770832423.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/belivawujowimizoduwu.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/jewomusepatovagopedib.pdfIn PDF document text
    • http://oprandi.it/userfiles/files/rinarenesawezelekagejiner.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/14091020543.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/nuwifawepinaxazabugivaseg.pdfIn PDF document text
    • http://autovoda.ru/upload/files/funorelezudar.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/fagilapal.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/82607246641.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/pujubo.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/kekobofijesobitak.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/b0c862032238263f5a1ff049198c9c0c/purexasadoru.pdfIn PDF document text
    • http://plncse.hu/php_data/file/53219896250.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=watch+reign+season+1+online+freePDF 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_off0000af9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9B 10660 bytes
SHA-256: e3caeb40b8c67f7ecaa0a17bc72e864d7dc1fd035854a29eed42069a5439c86d
font_01_sfnt_off0000c80a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80A 16636 bytes
SHA-256: f6935aeca2c39451a53f44412c747cde92984cd963db35bd7125456b379cf1d8
font_02_sfnt_off0000f243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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