Malicious PDF — malware analysis report

Static analysis result for SHA-256 9193a74b886f55df…

MALICIOUS

PDF

85.1 KB Created: 2021-09-13 19:03:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: e7c618e4636944d552d377e2bb2d2b42 SHA-1: 2b60c0ae75aa6ee88ef7ac8bdd1b825f52edb317 SHA-256: 9193a74b886f55df9adb609fa80c939c7b038ca92b4d0914fed98092013d7cef
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://scsychem.com/upload/files/21030138442.pdf In PDF document text
    • http://konberdbio.com/upload/files/jitogowoboj.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/meximugositi.pdfIn PDF document text
    • https://activepymes.com/pub/file/kidutofupavesidepujimo.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/61490051806.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/wasefezevavol.pdfIn PDF document text
    • https://sportyou.fr/ckfinder/userfiles/files/18986994153.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/tuzavenuwuwowonurifiguxeb.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/17201931924.pdfIn PDF document text
    • https://livres-d-art.com/ckfinder/userfiles/files/kolapivugopiziras.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/sajebogumebab.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/gujedivopubutisuba.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/52926984290.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/ruzira.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/44846956041.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/remujigukapuzatamuwonos.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/9390498705.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/99451098438.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/f2ef773cc8073e7f7cebc4ffe71e93a9/47701091809.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a81fb1efa4---kulodobefagalelobuzom.pdfIn PDF document text
    • http://twilaw.com/files/files/woson.pdfIn PDF document text
    • http://ranch.pl/files/file/96442249811.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/59437793349.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/13524668165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=the+friar%27s+tale+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_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 10368 bytes
SHA-256: 47275ea6ea410d0672bffb4e1c90053df87c20ae675e6d93163f9e7e667ba0ae
font_01_sfnt_off0000ffd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD4 18224 bytes
SHA-256: d74af2154997f5f73114c388ee91a03d9383ec7b9e0f6ff31f69345cfbaaf3f0
font_02_sfnt_off00012f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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