Malicious PDF — malware analysis report

Static analysis result for SHA-256 f048409cfffcfb9c…

MALICIOUS

PDF

86.6 KB Created: 2021-09-23 15:24:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 72ef23e70324abf9b8c8f9643fd9f7c1 SHA-1: 06609351bb07e9ff1e3498c8ca0ffa3619faf038 SHA-256: f048409cfffcfb9c0c8911a9e4b8746999e35fc5ccf210f8551f1c23f173dfdd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, suggesting an attempt to distribute further malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious intent, likely to redirect users to compromised or malicious sites.

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 http://musicpark-live.de/userfiles/file/98078672617.pdf In PDF document text
    • http://artecgroupservices.com/imagenes/file/fisarejojojozaru.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/nagova.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/93367413695.pdfIn PDF document text
    • http://dnt-mayak.ru/content/File/rakuxu.pdfIn PDF document text
    • http://amdind.com/userfiles/file/zufidolufirurudur.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/nuverukoxemigotozinigexix.pdfIn PDF document text
    • http://shinyoungvalve.com/userData/board/file/5070813072.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d265bb037e---musulep.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/f61b36e50af85a896774190a3f64fdb2/lebokofakopitojuxizu.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/garerebomumafatosadis.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/59310614523.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/1742061127.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/83861996378.pdfIn PDF document text
    • http://ombs.ru/uploads/files/63631466545.pdfIn PDF document text
    • http://vedepcuaem.com/luutru/files/gurowalapazijaginas.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/suviwazulew.pdfIn PDF document text
    • http://hastensandbreakfast.nl/userfiles/file/98885280798.pdfIn PDF document text
    • http://autoscuolepintozzi.it/userfiles/files/taselojewene.pdfIn PDF document text
    • http://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/29195522080.pdfIn PDF document text
    • http://elitvorota.ru/f/file/sozasonojapivepati.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/bevepe.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/71131766989.pdfIn PDF document text
    • http://gzafjc.com/uploadfile/files/jisesajedogalenexer.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202109041116139413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=autumn+leaves+piano+sheet+music+pdfPDF 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_off0000eda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA2 17636 bytes
SHA-256: ab59f08b0143e1af8b16bce53f51513584e0ac496f0428da51be9e4910445b5c
font_01_sfnt_off00011b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13331 10932 bytes
SHA-256: 5a95db4b44ccf6f34e709f69f0847eca4c601d618e8095d3f8bf20b1ec89330b

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