Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f9205d05f089f1…

MALICIOUS

PDF

69.3 KB Created: 2021-09-15 22:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 692ba6e98d49480d59b7959ebdaf1d9e SHA-1: fbd8ff4f231726548ec13218b7cef64790db1f1d SHA-256: d6f9205d05f089f17aab38645efdcb98dab91bbbf02f9ec6faa71886e3c24a71
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 0.9982

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://stphilomenaonline.org/userfiles/file/75414650896.pdf In PDF document text
    • http://sportsclinicwest.ie/media/contents/file/37746173839.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/novumagumupumujesikudu.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com/app/webroot/uploads/ckuploads/files/45884866065.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/puburudebatiwofaxa.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/tuzawalef.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141fd6014036---7403853125.pdfIn PDF document text
    • http://keralatravelpath.com/uploads/file/pirodemezoxetesow.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/powopuxamefe.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/nidomifasatom.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/serugozogutexanitefipisex.pdfIn PDF document text
    • http://photonart.nl/phpcmsys/file/11355809568.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/24210720212.pdfIn PDF document text
    • http://tlumacz-bialystok.pl/pliki/file/93282123514.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/2021922114262217.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/72891986850.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/3cad39d7bce1e8b896eb04dc87d38c87/mapofewomox.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/85662264510.pdfIn PDF document text
    • http://xn--80aguejfegacgj0ad.xn--p1ai/pict/file/38663133796.pdfIn PDF document text
    • http://aprt1day.ru/file/60286686597.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/nufifodopolopix.pdfIn PDF document text
    • http://vit-physio.de/file/mibixasebudojawutavalogab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=google+nexus+7+tablet+reviewPDF 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_off0000b12a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB12A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93C 14488 bytes
SHA-256: e86162077daa0bbe347d6c3103da0282693c1e3f82389dcdb7283c6e19666b21
font_02_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 10864 bytes
SHA-256: 794e9681a0e4ff8e75f11df3e99266517c3a721c9bf0cfc50dfa09ea7f4340e4

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