Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce58b2c2f64b69c…

MALICIOUS

PDF

73.6 KB Created: 2021-09-18 07:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6ae5edddcfcfe98c643eb1155b9c5ab8 SHA-1: f4fa7ef69eb22eec3607894a6f842b9ba0bc177f SHA-256: cce58b2c2f64b69cdafa9de9c741db09e2305750d2abd2ff412ea1c5d833fbf1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards it being used as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://chiangmai-esc.net/user_img/files/65566933538.pdf In PDF document text
    • http://jcpingie.be/public/files/78083657469.pdfIn PDF document text
    • http://nanopena.cz/upload/file/29151644997.pdfIn PDF document text
    • https://miraclechuppahs.com/userfiles/file/42752561854.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/89882920716.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/dobokisedolafubet.pdfIn PDF document text
    • https://praktijk.zorglink.nl/ckfinder/userfiles/files/mobejarizotavoduviwex.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/47098307442.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1613efed420b0f---27893513855.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/jexidukomemuloroj.pdfIn PDF document text
    • http://gdgom.com/upload/file/210907150359342841no5dy3cs0n6k.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/15586668184.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/rewobapuga.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/zujimememidusutibojapebaw.pdfIn PDF document text
    • https://xetnghiemadndanang.com/upload/userfiles/files/sijuxukuzafikuxewubi.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/rilaw.pdfIn PDF document text
    • http://africareview.in/userfiles/file/95769471451.pdfIn PDF document text
    • https://affordans.com/ckfinder/userfiles/files/bubiposi.pdfIn PDF document text
    • https://unitedfightalliance.com/ckfinder/userfiles/files/rerewetodap.pdfIn PDF document text
    • http://lanaecoloridabruzzo.it/userfiles/file/71097583720.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/nataxulezubojapasuribuja.pdfIn PDF document text
    • https://papiratisk.cz/soubory/xedas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=the+walking+dead+hack+apkPDF 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_off0000bdc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC0 10448 bytes
SHA-256: 710c2b7b48f2553922a441390dbfcd3faf47068482584e1dd02721462d1e6069
font_01_sfnt_off0000d529.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD529 17112 bytes
SHA-256: ece8aed605e3bd570e24c492a8d7d6229a75a9541d09955157058441f968d580
font_02_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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