Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c3f9897877bca0…

MALICIOUS

PDF

83.9 KB Created: 2021-09-14 00:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: dfe916f6f48665e80e0e3a0eb4a442dd SHA-1: d0f7748c2d65d1c7c490aa6b131d72641a5bdaf0 SHA-256: 94c3f9897877bca083ff89a1814228e776380bd707a74f0b567357f78106ce25
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to numerous external URLs, some of which are hosted on potentially disposable domains. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it is designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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.
  • 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://atletika-pardubice.cz/files/file/fugezelabokavab.pdf In PDF document text
    • https://alkoplast.rs/files/nenimuwijupeluwupifawarad.pdfIn PDF document text
    • https://capitalsyndic.com/userfiles/file/wijerobufew.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613909fe42633---73762871408.pdfIn PDF document text
    • https://jagamimpi.info/contents/files/39249619105.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/vonavenuwugigadedi.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/64940378926.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109012137067823.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/52435503688.pdfIn PDF document text
    • https://rsvforum.com/userfiles/file/vabaninurifitenobavubenot.pdfIn PDF document text
    • http://gocep.org/data/userfiles/files/64548741328.pdfIn PDF document text
    • https://interconformity.ro/images/file/42906377352.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/5400909246.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/94899832843.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/77933640849.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • http://bobiniauto.com/userfiles/file/duwijefazitumet.pdfIn PDF document text
    • http://denda.co.kr/ckfinder/userfiles/files/48878329858.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/sipagokex.pdfIn PDF document text
    • https://oldd.adventurenetbg.com/userfiles/file/nosejudesufonedupugexor.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/noribonofe.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109130454386663.pdfIn PDF document text
    • http://mariautonoleggiomarsala.it/userfiles/files/wapedajowaj.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/bikapabujod.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/37170788170.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=app+android+market+alternativoPDF 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_off0000e442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE442 10524 bytes
SHA-256: fdf603aaa8e9ceaf11e758d06181f6d73efeef0edb11e56b53a172960663ce17
font_01_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 17616 bytes
SHA-256: 01ba9a6994f2b194b39099fe508406340e5e66ccff7a5a250401724c7b1ceddb
font_02_sfnt_off00012a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1