Malicious PDF — malware analysis report

Static analysis result for SHA-256 295e38ad2a55ce41…

MALICIOUS

PDF

75.4 KB Created: 2021-10-01 18:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b3f08748f3f20e4b6ffe99e92f5c84f4 SHA-1: 467e0e1116e14543f1c61c2b84ba533fd35ac480 SHA-256: 295e38ad2a55ce4128f107a66edaff9da5812c2202bf392bb7df6a89586c6365
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://csc021.com/userfiles/file/20210905214602_j0afcs.pdf In PDF document text
    • http://donovaly-ubytovanie-safran.sk/web/userfiles/file/toveduti.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/35396149875.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/23279590998.pdfIn PDF document text
    • http://konberdbio.com/upload/files/67571866998.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/xowirikemadijesu.pdfIn PDF document text
    • http://f-kcc.jp/user_data/userfiles/files/67210525596.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/pexemuz.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/vesopej.pdfIn PDF document text
    • http://madinagirls.com/easydo%20v2.00/files/uploads/80899056505.pdfIn PDF document text
    • http://cateringkieuan.com/uploads/userfiles/file/44060167243.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/binawogiziruralinogesuv.pdfIn PDF document text
    • https://pharma-tools.pl/galeria/file/14641554465.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/zelor.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/527d4a759f68a2ad69f04390f519e3d1/26984406867.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/10172178623.pdfIn PDF document text
    • http://odontotecnicacoop.it/userfiles/file/refanaxijuri.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d9f409b8a---58199748670.pdfIn PDF document text
    • https://xosobacninh.vn/webroot/img/files/giketag.pdfIn PDF document text
    • https://www.loisirs-auto-occasion.fr/ckfinder/userfiles/files/37360842155.pdfIn PDF document text
    • http://sportservistocik.cz/UserFiles/File/linamir.pdfIn PDF document text
    • http://koppeika.ru/userfiles/file/tixuzoworubalavujaz.pdfIn PDF document text
    • http://nyitotthetvege.kastelyszallodak.hu/userfiles/files/39515867814.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/42954415565.pdfIn PDF document text
    • http://uchid.com/uploads/file/nevarafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=vhs+cam+pro+apk+androidPDF 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_off0000be21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 10564 bytes
SHA-256: 324efd38ca8837c4ada3ced1f066748d6782d2a6c4395e65574975495e06b6c6
font_02_sfnt_off0000ee13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE13 18648 bytes
SHA-256: c48e776807b60839d6d1396560c746560a56de7f6da12676031e114ce44bfde7

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