Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c24fb81aa27ea6…

MALICIOUS

PDF

36.2 KB Created: 2020-06-08 06:27:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e921127b3c3908e4631c208ea8a1f45d SHA-1: 3355c9db68c77ca9f1aa4c595aa535d9645d391f SHA-256: 89c24fb81aa27ea6259f3b784db06cfce262c59292ada2df7e8d1cf71994a6fd
96 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of SEO poisoning or link farm abuse, as indicated by the 'PDF_SEO_LINK_FARM' heuristic firing. It contains a large number of external links pointing to other PDF files hosted across various domains. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of external resources, likely to distribute malware or engage in phishing activities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://enchantinglashboutique.com/uploads/1/3/1/3/131381134/131381134.html#exercice+calligraphie+adulte+%25C3%25A0+impri
    • http://vercay.net/uploads/1/3/0/7/130739492/lojak_ripogilujub.pdf
    • http://bigfactore.com/uploads/1/3/1/3/131398583/943e5e73.pdf
    • http://ravenrose.com.au/uploads/1/3/0/3/130323600/5194074.pdf
    • http://hostmaster.h1learning.com/uploads/1/3/0/6/130620681/mopabagetimigod_nulud_dinuxajewo_buxatomexo.pdf
    • http://_mta-sts.creativescapestx.com/uploads/1/3/1/3/131383698/9472734.pdf
    • http://suly.com.au/uploads/1/3/0/9/130969115/fapevojunamuzi-xikokageni.pdf
    • http://we2gethertravel.com/uploads/1/3/0/7/130775567/6f252f7131.pdf
    • http://ncaop.org/uploads/1/3/1/4/131406985/vegajapez.pdf
    • http://tammaroautodetailing.com/uploads/1/3/1/8/131857215/xorofidazabezaf.pdf
    • http://susiesduck.com/uploads/1/3/0/8/130874426/vebipibujod.pdf
    • http://geekspot.ca/uploads/1/3/0/9/130969568/1754495.pdf
    • http://emmamiremadi.com/uploads/1/3/0/8/130874111/8102483.pdf
    • https://lufulekosaro.files.wordpress.com/2020/06/95704920223.pdf
    • https://xuzetepevot.files.wordpress.com/2020/06/1838397592.pdf
    • https://netigosod285927460.files.wordpress.com/2020/06/21947107171.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f58.bin
882250ebe4cb432ca447e4832e921e066a75d703a4ecc3c645cb0f3b3236df9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F58 11144 bytes

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