Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d665bcc8df1a14…

MALICIOUS

PDF

80.3 KB Created: 2021-09-16 21:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2a816d5505b7876a55cb8abdece6852f SHA-1: 6a925f54bf50526be1fd90c837daa3a8871d4e21 SHA-256: 35d665bcc8df1a141da09dda82026d22199fe49ea5a3d97ad67a4417fb32f2a6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript points to its use in executing malicious actions or redirecting the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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 https://drafthe.ru/uplcv?utm_term=contra+garena+apk PDF link annotation
    • http://icaalliance.org/filespath/files/20210911220158.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/nujolasofuzu.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/rujupuvetu.pdfIn PDF document text
    • https://solelane.com/ckfinder/userfiles/files/dozajixexofibirizuk.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/68362053159.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/vaselepazut.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/99328093520.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/7557026228.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/bofokexexafexolisu.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/zofokalalu.pdfIn PDF document text
    • https://mavibusiness.it/file/43544387407.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/42458003813.pdfIn PDF document text
    • http://manpukulivermore.com/uploads/files/49488062795.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/badupulanurokomowuvi.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/44550451854.pdfIn PDF document text
    • http://www.drivingschool-brno.cz/files/files/39128027495.pdfIn PDF document text
    • http://sea-cruise.ru/ckfinder/userfiles/files/wolexavodevo.pdfIn PDF document text
    • http://zoo-foto.cz/userfiles/file/zuxirozizofiwitik.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/64025889586.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/jijopususurojumagutejo.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/64116763206.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/milemedorenorolifig.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_off0000d669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD669 10244 bytes
SHA-256: dd4b722981af45d9926a993be889371eeee2e250852545effa4d86a4c5cb9125
font_01_sfnt_off0000ed9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 17980 bytes
SHA-256: 200bd4e4ed2e323b556a5db5242a5073b79a826a7a3796295ddeeb823e670f3a

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