Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ed59f88c7b0482…

MALICIOUS

PDF

81.2 KB Created: 2021-09-11 02:24:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2fe0eb2457dce7dd43eaac6f5ba80f32 SHA-1: 183b102a5ec237ef36be727972e984a41d6cbc44 SHA-256: 32ed59f88c7b048201fe0168337a4e988d5803854a0da40d57a82e636a5155d6
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports this assessment. The document body is heavily obfuscated and unreadable, preventing a deeper analysis of its specific content or intent beyond URL distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 4

  • 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://cructi.ru/uplcv?utm_term=memo+for+android PDF link annotation
    • http://creaorganization.com/depo/sayfaresim/file/32448771307.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/lugikoninuxubawitusape.pdfIn PDF document text
    • https://togeltop.net/contents/files/14951954332.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/28356534955.pdfIn PDF document text
    • http://gmart-express.com/demo/uploadpic/file/bofuse.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/guwanenurobofaxujepud.pdfIn PDF document text
    • http://grasslandtj.com/upload/files/5285268913.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132810e32b29---kanesifexajan.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/55357213256.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/refejom.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/22082323133.pdfIn PDF document text
    • https://clinicaabrahaoosta.com.br/ckfinder/userfiles/files/wenasupezavitesifumesoro.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/togijuviratizigiwor.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/5f6b7c0e3789006abb85cf4741ed192a/vofoduz.pdfIn PDF document text
    • http://zenkatsu.dk/files/39808634307.pdfIn PDF document text
    • https://5udua.com/contents/files/6948724674.pdfIn PDF document text
    • http://schuetzenfest-hemeringen.de/ablage/userfiles/files/92223815913.pdfIn PDF document text
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/29777967351.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210910095314032.pdfIn PDF document text
    • https://fwstc.in/userfiles/file/duwugelokav.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/nuravotaliseruwitunatodul.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/nijemajofifidaxol.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/11101503933.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/fodoxekiv.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_off0000d502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD502 19676 bytes
SHA-256: efec70c8f18c64fb8597b3d0492cb048cf699cc52d078f3624ff968c4d3d9155
font_01_sfnt_off00010850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10850 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12067 10196 bytes
SHA-256: 7572df856c54ac68daa2cb83c366acf4bb53ed570f48c8a04726235e720b2184

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