Malicious PDF — malware analysis report

Static analysis result for SHA-256 92a72dba7f2bbd0a…

MALICIOUS

PDF

75.9 KB Created: 2021-09-18 02:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1a26703dc052562fe3886e56003a6167 SHA-1: d22cb6881d77aed616071e7e291bfd67723bffa8 SHA-256: 92a72dba7f2bbd0acb53a82f8363174970b01f58e650552cfe28c1c47e14ddfe
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded links, some pointing to IP addresses, which are likely part of a link farm designed to redirect users to malicious content. The presence of multiple external URIs and the 'disposable link farm' heuristic suggest an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://svltv.in/userfiles/files/bitemegajuxuzanoxotirar.pdf In PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/711124706ba4a9d3c79c639d2753f8e9/7797666641.pdfIn PDF document text
    • http://twapp.freshkon.com/upload/files/zofopekonerasira.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/47087475290.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/28881441742.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/fukuzaxoxukefefotimati.pdfIn PDF document text
    • http://fairfresh.net/assets/admin/ckeditorimage/files/lesajozifofuwojazove.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/zajutexepekume.pdfPDF link annotation
    • http://abimobiliare.pl/pliki/File/86418633226.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/wekoxepakijokara.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/fibutizorir.pdfIn PDF document text
    • http://arcenevents.nl/site/upload/files/84672626356.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/86289393872.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/bagipif.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/81345760016.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/80518829251.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/40470450531.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/70315849894.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/22020356155.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16143d92ca0338---3049475885.pdfIn PDF document text
    • https://ascend.sut.ac.th/ce/2017/src/plugins/ckfinder/userfiles/files/makajasofamasupepo.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/wixarixo.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/weninizivabefidalubuj.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109172121137965.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+dragon+ball+z+tenkaichi+tag+team+ppssppPDF 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_off0000c376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC376 17068 bytes
SHA-256: cdc3849009fd169031d643816dcfb7cbaf6c6c2e454489d507460290151ca777
font_01_sfnt_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 11340 bytes
SHA-256: e28373e6b9329e392cea8626ee8f7ba3abf4d6b987625dbf7c15687151d5bf47
font_02_sfnt_off00010a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1