Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebc4aa17bb6c2b9…

MALICIOUS

PDF

85.4 KB Created: 2021-09-18 20:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c4f64e2b9b23e27583190ad0108cd58 SHA-1: 05385e59eb5985d201e72da5629f88107c3b75e2 SHA-256: bebc4aa17bb6c2b95b0ff638cce82093f8ba486cd13a9e07d9efa92515cdc235
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while many are marked as benign, contribute to the overall suspicious nature of the document's intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://fonixkoncert.hu/upload/file/42999585842.pdf
    • http://yongchengtech.com/uploads/files/202109140947173572.pdf
    • https://bilalyapidekorasyon.com/userfiles/file/lotogo.pdf
    • http://orlickachata.cz/files/files/25216847359.pdf
    • http://handbook.hu/upload/page/file/40018812233.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/1b2b9ded0708d74ae9766e5677bd30a8/82802744292.pdf
    • http://bwlpsalisbury.com/uploads/files/fulopekobibolulumawelu.pdf
    • http://offerparts.com/upload/files/suborabelamuzaxalib.pdf
    • https://careerexpo.alljobsinliberia.com/ckfinder/userfiles/files/38287599152.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f305aaa0e4---53786797320.pdf
    • http://kadh.kr/bobod/upload/file/ruzusotukubomejuso.pdf
    • https://jmtours.co/aym_image/files/mukikizaxiwanadisilatuzu.pdf
    • http://kehlux.lu/userfiles/files/nozedepebedezudije.pdf
    • http://ghibms.com/userfiles/files/12259080096.pdf
    • http://nawoo.net/userData/board/file/polojopaxuripirujowefi.pdf
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/fafivigafonig.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/12995364329.pdf
    • http://mayinmaunhat.com/upload/files/23702716161.pdf
    • http://seoaudytor.pl/userfiles/file/43527079715.pdf
    • http://daoltrading.com/userData/board/file/wowuxu.pdf
    • https://jackinthegymtpe.com/uploads/files/202109060449312262.pdf
    • http://mariamozharova.ru/uploads/files/fupomujogujozerigum.pdf
    • http://terezszilvia.com/images/uploaded/file/wesoko.pdf
    • https://eklyps.net/images/file/80721428026.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=sdk+paypal+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e786.bin
7f0a82fd8f38887bb68eaa849bf0590a9ef18459735b007ccf713d948e7a6423		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE786 18828 bytes
font_01_sfnt_off000118b4.bin
e21b3b52037cde185e7c1e30502c2cc7082f49d92ed87f0291d4330cf0b11315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118B4 10268 bytes
font_02_sfnt_off00012fe5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FE5 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.