Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6b1cce1cc2b2cd…

MALICIOUS

PDF

94.8 KB Created: 2021-09-08 15:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: 8e5bbc1aadaadc4e256380e5f93cec2d SHA-1: 9fb9d98ce2244b73ae22a394d88d98c84d1e70ef SHA-256: 0e6b1cce1cc2b2cd1b35f15756879ed67b62c0e18928b8fd86f2e65345b0b447
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 0.9988

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 https://tssch.in/tssch/application/admin/uploads/file/65360774282.pdf In PDF document text
    • http://cozycornerexpress.com/uploads/files/97763652483.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/27074275671.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/98434419083.pdfIn PDF document text
    • https://cardolf.ro/files/filakawukulod.pdfIn PDF document text
    • https://airbays.com/userfiles/file/42640320175.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/12245623153.pdfIn PDF document text
    • https://profesa.net/userFilesfile/1464463703.pdfIn PDF document text
    • https://morethancars.eu/uploads/edytor/file/bonanewagiruvawovolitew.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/duxuxuv.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/70793614362.pdfIn PDF document text
    • http://studiotecnicodambra.eu/userfiles/files/50811946064.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/welomejiworoponafer.pdfIn PDF document text
    • http://wsmr.us/userfiles/file/famowugowakeleguti.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/15468817782.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/zidaloriguj.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/lunetokivesogegefikafow.pdfIn PDF document text
    • http://atek-ent.com/upload/file/19361198362.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/75756950752.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/jirakesavukulitavodaxura.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=sap+hana+high+availability+and+disaster+recovery+pdfPDF 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_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 11292 bytes
SHA-256: 8098de92d09586a9a8f1f24fb68583df3ba155c862fb6e60d740472bc24d9fcb
font_01_sfnt_off00012586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D98 18144 bytes
SHA-256: 6373802a76c5ee81b7dd900037d29a589524a7c4c33ac4b783af603e41e14719

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