Malicious PDF — malware analysis report

Static analysis result for SHA-256 09d097c777c748bc…

MALICIOUS

PDF

80.4 KB Created: 2021-09-17 11:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 333cd5c12a6be5820d225829ba081c8a SHA-1: f417e83c6e1639065ddb7a4e727e6b203f575b48 SHA-256: 09d097c777c748bc21c5556a87965a59ac5914d15bfa10174f9c84694bece102
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and appear to form a link farm. This suggests the document's primary purpose is to redirect users to potentially malicious websites, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are strongly indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://coretry.ru/uplcv?utm_term=plato+book+republic+pdf PDF link annotation
    • http://xhiehchin.com/Xhieh_News/_file/rugobuzoronoxujakid.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/fawugib.pdfIn PDF document text
    • https://jagominum.com/contents/files/24657338672.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613f903c45b4c---tijoxunexu.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/49749696544.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/kivozubisizafozez.pdfIn PDF document text
    • http://vkts.se/userfiles/file/63238170647.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/21814668970.pdfIn PDF document text
    • http://stauarchitetti.eu/userfiles/files/97102190195.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/gurisofifo.pdfIn PDF document text
    • http://konberdbio.com/upload/files/gafekejinupul.pdfIn PDF document text
    • http://c-six.it/userfiles/files/35731042394.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/29020542298.pdfIn PDF document text
    • https://raguvosbaldai.manovonia.lt/images/files/6674988430.pdfIn PDF document text
    • https://tranhdaquyhn.com/uploads/news_file/kerowivufu.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/60484403667.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/gemigu.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/ufovolidajuwifaxunun.pdfIn PDF document text
    • https://nhaccugiare24h.com/uploads/userfiles/file/59356381937.pdfIn PDF document text
    • https://eagle-aviation.com/userfiles/files/xusokuj.pdfIn PDF document text
    • http://giovanniseneca.eu/userfiles/files/88736127083.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/zitekaxorivilujovon.pdfIn PDF document text
    • http://refinerlink.com/userfiles/file/88802620972.pdfIn PDF document text
    • https://produse-zilan.ro/files/guxabozivipewogedu.pdfIn PDF document text
    • https://nusbetaja2.com/contents/files/lojijisizebipola.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/dezituwodezilidunilokusi.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_off0000d1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B6 10672 bytes
SHA-256: f0c3cec55f680eb903aa19f6e77cc310b1660c69ff2626671d77462e6ac42fb9
font_01_sfnt_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 19000 bytes
SHA-256: 9ab52773e1e6bcd6f73c52c9cf3662a24068c4be014613c05041b7da45c53348
font_02_sfnt_off00011ba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1