Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74c7a6f33262dfa…

MALICIOUS

PDF

85.7 KB Created: 2021-09-19 09:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 26f8f50a9e86cb983fba568d406bcb41 SHA-1: 314c0f3cfa4e8b1ae3b46aff4698f2a5069fe8b7 SHA-256: e74c7a6f33262dfa64871eaa70508df5e88ecc4d68e6e6344c04e6a51ff502cb
174 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external links, with one heuristic specifically identifying a 'Remote-support tool lure'. This suggests the document is designed to trick the user into downloading and executing remote support software, likely for malicious purposes such as unauthorized access or data theft. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://simp-q.ru/userfiles/file/ledulemebubo.pdf In PDF document text
    • http://jinruily.com/UploadFile/file/20210911075259529.pdfIn PDF document text
    • http://www.workbythai.com/admin/assets/images/54380904048.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136c7b2c9868---54141900768.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/wenebikumutume.pdfIn PDF document text
    • http://aygroupmuh.com/image/files/30221598152.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/80651554501.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/50424674684.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/pusosapixega.pdfIn PDF document text
    • https://maria-galland.ru/files/file/28369911862.pdfIn PDF document text
    • https://primer-spb.ru/files/files/tibolebumalum.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/64009225841.pdfIn PDF document text
    • http://kamerton.nl/clientfiles/galakevebefugobede.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/nalokokevedomoro.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021917185137170.pdfIn PDF document text
    • http://nanopena.cz/upload/file/66048507906.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/49379302154.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/pifumizemovexi.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec28d4bbc9---segaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+turn+your+tablet+into+a+monitorPDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/31600947739.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_off0000e86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86A 10532 bytes
SHA-256: 36301dbfb5573bfc6ef39a5226ab30040c76571959b22131d892ae9a571a0efd
font_01_sfnt_off00010060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 18960 bytes
SHA-256: f213eb89749000180732c87ca90139e64c81f50622cc6ec6fb02b927b152c645
font_02_sfnt_off00013135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13135 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1