Malicious PDF — malware analysis report

Static analysis result for SHA-256 692696e0fcdbb5df…

MALICIOUS

PDF

69.5 KB Created: 2021-09-14 07:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7bf0c83c52bd57752a234165e9835eaa SHA-1: a2de2d985f72ec67a420fad1ad0d051d9739cfdc SHA-256: 692696e0fcdbb5df2e76ed1f06a32ff18fb96e89742e4ade2f641b88aaf70e85
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to disposable domains, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document is designed to funnel users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137453036d01---51890384190.pdf In PDF document text
    • http://alacarte-design.de/userfiles/file/7724652520.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/12548032270.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/90733484698.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/mopubapowinaterugu.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210908125933.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/fawop.pdfIn PDF document text
    • http://nemochem.cn/upload/files/kidonal.pdfIn PDF document text
    • http://festacreativita.org/userfiles/file/7780543701.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/95986179485.pdfIn PDF document text
    • http://carbonelite.ru/file/2692774206.pdfIn PDF document text
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/6270236366.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/57778904575.pdfIn PDF document text
    • https://mtydizayn.com/userfiles/file/nowemepijen.pdfIn PDF document text
    • http://rc-mst.com/mst/_upload/files/ponuronegedo.pdfIn PDF document text
    • http://giteduguedesboires.fr/userfiles/file/pafixasufofobog.pdfIn PDF document text
    • http://agronlogistics.com/userfiles/files/zujawin.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/37871283317.pdfIn PDF document text
    • https://www.cylinder96.ru/admin/ckfinder/userfiles/files/nexeso.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/posowipalaxime.pdfIn PDF document text
    • http://kapfenberger-schuetzenverein.at/userfiles/file/sidapiwaw.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/31886317832.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=psychometric+test+for+sales+job+pdfPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/xikuminukumevuruvum.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_off0000b245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB245 11168 bytes
SHA-256: 0c0adb17a138deaef1d90170668ab8be64de2418e702dcaf14f5deb80ebe1de6
font_01_sfnt_off0000cc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 14704 bytes
SHA-256: 8ddb62aa80bc9ac0f0a4696a3fb7bb3ee6ac70ba42771a40a110bad3f1828361