Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd4078d03cc02fbd…

MALICIOUS

PDF

71.4 KB Created: 2021-09-09 11:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e7b66fd348c81087d85b096d62872c39 SHA-1: 00fcc18a0ea9ede92933baf3766f4631d246635d SHA-256: bd4078d03cc02fbd3b820f4ed02f28f4ad53beac785b2b62fff8ee974f359508
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external websites, suggesting a phishing or malware distribution scheme. The PDF structure and the presence of external links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oniceh.ru/uplcv?utm_term=postal+code+meycauayan+bulacan PDF link annotation
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/36059313970.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/mamesufojo.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/5d60b018b9f4bea05a140cd14ce6e182/15628445390.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/mategig.pdfIn PDF document text
    • http://tuderprogettazione.it/userfiles/files/42570604598.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/13855752488.pdfIn PDF document text
    • http://ortosprendimai.lt/userfiles/file/walitiwefulixebiwosepasim.pdfIn PDF document text
    • http://przyrodnik-kujawy.eu/userfiles/file/komutizewebadojarugisogex.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/39872052816.pdfIn PDF document text
    • http://ijdssymposium.eu/upload/2023907781.pdfIn PDF document text
    • http://marktoby.com/akram/know_news/admin/userfiles/file/vobupunapobol.pdfIn PDF document text
    • http://taispacedesign.com/upload/files/lexuzolob.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/tuvol.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/nafamoxufifajipelozol.pdfIn PDF document text
    • http://sunrui-ti.com/d/files/novuzewidomagaxolinusisub.pdfIn PDF document text
    • http://agavietnam.com/img/files/91945766275.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210908205303.pdfIn PDF document text
    • http://wamer.org/userfiles/file/77355040003.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/75319972730.pdfIn PDF document text
    • http://technology-mp.it/userfiles/files/jisanobapogan.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/91149220763.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210909084958_v8au0o.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/55182364960.pdfIn PDF document text
    • http://dmkert.hu/files/file/49674834945.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_off0000b54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB54A 16204 bytes
SHA-256: f903f6b0dcc8db7994c25957131e5c5e9979c7b8de26fc47294691f055d63d20
font_01_sfnt_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 10696 bytes
SHA-256: 7639eccc2681c08920d7214e531ef3d123d57e4229c9151fd2d9c0c342d9518f

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