Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d088f20a09c4af…

MALICIOUS

PDF

82.8 KB Created: 2021-09-10 22:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: b1ab4537f1f3c56ede2a62ab985dd8b6 SHA-1: aff6ce4429d74428f818d3aff6695bfc0e4ce496 SHA-256: d6d088f20a09c4afe3d23ecc97041e20f5ea55fe24aacdad13b425db14338c36
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://globalfeedindustry.com/upload/files/25893455178.pdf In PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/fipabinufosedominovezexad.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/vibowujot.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210904014832.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/vovukaziganagegatuz.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132feace3caf---74693733806.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/zijasidoziwekonumu.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/gakiminopedadebegot.pdfIn PDF document text
    • http://sensitiva.fi/UserFiles/File/xezivela.pdfIn PDF document text
    • http://rassadaspb.com/new/files/file/7765025123.pdfIn PDF document text
    • https://terracell.pt/images/file/firerikurixodajoreb.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/gefiririxotavuweduto.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/61324863985.pdfIn PDF document text
    • http://zjgjqmr.com/v15/Upload/file/2021921254422237.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/pebuxovirob.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/selafoxe.pdfIn PDF document text
    • http://builderall.info/userfiles/file/61074201381.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/868485925.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/7398536064.pdfIn PDF document text
    • http://cesarrodarte.com/userfiles/file/venomodaredefobi.pdfIn PDF document text
    • https://hoangmailogistics.com/asset/site/files/22706633336.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/tuvojafozabepazofober.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/39053553354.pdfIn PDF document text
    • https://albertoangel.sinecsas.com/ckfinder/userfiles/files/79446147585.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/93050512320.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/madidozagudemajeduxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=harry+potter+full+movie+tamil+dubbedPDF 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_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 18260 bytes
SHA-256: 78ef96e4c02eb1a2bc8854c5d6a579322f611bf9cc67115c89546fe909375fac
font_01_sfnt_off00010cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000124d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124D1 10800 bytes
SHA-256: dd0d23283fb8eba5027118c0b17a54a8360e22d88223040e86a4e665f855f531