Malicious PDF — malware analysis report

Static analysis result for SHA-256 05eda3b2f824eb9a…

MALICIOUS

PDF

73.5 KB Created: 2021-09-11 16:34:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 5f5518fb520546b4595ca7ff04294803 SHA-1: 22c8298f3a6d4817736b5499b6a12c3660a3dba9 SHA-256: 05eda3b2f824eb9a80041f3c7c1540f464d05f1d51a48b861a1e29c620402165
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9963

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://anhhuynoithat.com/asset/files/vitapefig.pdf In PDF document text
    • http://asupuro.com/user_data/image/file/26150873430.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a5f40f8c7---30759802345.pdfIn PDF document text
    • http://beta-rc.com/upload/files/88178999136.pdfIn PDF document text
    • http://www.ximangsongthao.com.vn/app/webroot/uploads/files/vawotetagotulasape.pdfIn PDF document text
    • https://kurashi-kyoiku.com/cms/dat/upimg/file/9290166888.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361d014a184---xosozunofili.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/butisa.pdfIn PDF document text
    • https://bosingels.nl/ckfinder/userfiles/files/8134729571.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/komuxovetapekan.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/6984695990.pdfIn PDF document text
    • http://www.celso.org/download/27681512718.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/34525124679.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/lojinezixikifexofeto.pdfIn PDF document text
    • http://sparan-art.ru/ckfinder/userfiles/files/finapazuvosofepanekifon.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/vokupaturato.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/51231106594.pdfIn PDF document text
    • https://fond.ru/userfiles/file/89805956241.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/9266716017.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/28028962050.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/36150917240.pdfIn PDF document text
    • http://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28048692606.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pokemon+moon+zipertoPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5B 17900 bytes
SHA-256: 061c99c394e99ed1fed3a970753b04ef4420647745d6ef5329a8c8133aea3c1d
font_01_sfnt_off0000ea3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010255.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10255 10188 bytes
SHA-256: dc6d20bf18fcfd54a5dae9ece60561b21f1b978af5b4f7969b7da7134902aa74

Open this report in the interactive analyzer, or submit your own file for analysis.