Malicious PDF — malware analysis report

Static analysis result for SHA-256 addf0f7976093e07…

MALICIOUS

PDF

76.6 KB Created: 2021-09-15 10:06:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 54ae461c51f2a773b0411eb29b8944e3 SHA-1: 6f782a6b37b1d723212d0695a2284507b5de4a51 SHA-256: addf0f7976093e074568241ffe46aaeb9bbc28a9f8ac8cb689fa88f60e6a058c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URLs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=pokemon+let%27s+go+pikachu+gba+cheat+codes PDF link annotation
    • https://skatrip.com/basefile/skatripcom/files/dudonobazutolenaxatoke.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/kakaboneduzuso.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfda033c15---palizejux.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/55410434385.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/63207776677.pdfIn PDF document text
    • http://ailizia.com/userfiles/nalunesibegitavofowi.pdfIn PDF document text
    • http://daonshop.com/files/fckeditor/file/31878508293.pdfIn PDF document text
    • https://izometal.net/mm/file/jutupu.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xatujaxedegulumifaso.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/29765086037.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/46717205297.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/57554678557.pdfIn PDF document text
    • http://virtuozi.ru/sites/all/sites/virtuozi.ru/files/ditopiravigekanobofol.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/7a721d10fc05b406a2cf5307c1594fd8/26487877439.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/renajotamila.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/66933115678.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/kiletonapal.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/paloro.pdfIn PDF document text
    • https://lbk-ingatlan.hu/uploads/file/bipepafugavilaf.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/97854227619.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/25198938542.pdfIn PDF document text
    • https://verredistri.fr/xmedia/file/92633564233.pdfIn PDF document text
    • http://rajasthanmetals.com/userfiles/file/71284165580.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/75009097069.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_off0000c54b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54B 17396 bytes
SHA-256: 995291767b895fcff520a6fd064dbf7054b7715d71356b3008b5b746b6fcafcd
font_01_sfnt_off0000f2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABE 11228 bytes
SHA-256: 4a4636b7dacc890f94efd1d2446fc07b71f664f3b640ea66dcd38125d86b758e

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