Malicious PDF — malware analysis report

Static analysis result for SHA-256 00d0697a5f87bf66…

MALICIOUS

PDF

88.5 KB Created: 2021-09-21 06:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 167100758f9cb844b180e8bd46f79108 SHA-1: 0a7ae61236f0652273995bc643233594f5839c85 SHA-256: 00d0697a5f87bf66f979429729e2676cab8ba96f5df78ebb66c76dde1ba74325
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple URLs, with a high ML classifier score and ClamAV detection indicating malicious intent. The 'Remote Support Tool Lure' heuristic strongly suggests the document's purpose is to trick the user into installing or running remote access software. The embedded JavaScript likely facilitates the execution of malicious code or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archidaldegan.eu/userfiles/files/jutogafoxavogivoxoziwi.pdf In PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/68606855532.pdfIn PDF document text
    • https://polaria.cz/images/file/88154288518.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/63733353526.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/9319196482.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/sogujigow.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/42692813758.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/53979600582.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/pimij.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/mevekebupa.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/gezajoraposebuguxobezowib.pdfIn PDF document text
    • http://linker-apps.com/files/zawajeg.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/46733933184.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/163093714841802301.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef41991546---sezel.pdfIn PDF document text
    • http://karpatskiles.ru/store/files/63176640705.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/jesamikup.pdfIn PDF document text
    • http://ecompletecontact.com/ckfinder/userfiles/files/wimukozipuxesakulobu.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/venovijiwigo.pdfIn PDF document text
    • http://101eyewear.com/luutru/files/ninekamegasosikuvinil.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/rogipejo.pdfIn PDF document text
    • http://vinacafe-dalat.com/Images_upload/files/56810031543.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/loxezoxibujawipawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=use+android+as+remote+for+pcPDF 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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF7 18544 bytes
SHA-256: c70706e1c679a196d2f5c89f044d5bc5e1739ea2f07b801d561e78fc988c9e44
font_02_sfnt_off00013bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBD 10744 bytes
SHA-256: 2998b3462d090ef7d06c0b1f50d4290adb28b113e2ae30aead50ceccb7e5ffec