Malicious PDF — malware analysis report

Static analysis result for SHA-256 9165b153de70b9bc…

MALICIOUS

PDF

39.0 KB Created: 2020-04-09 06:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cbffc6920118b2649c0bb3c97747d84e SHA-1: 5b334802f4a8fec72ed7c50704a86dd3ac6483f1 SHA-256: 9165b153de70b9bceee674b8f1f1e87dfbf562fbdf8e212093db88871d54237c
94 Risk Score

Malware Insights

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

The PDF document contains a deceptive title and a large number of embedded external links, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users to visit numerous external URLs, likely for phishing or malware distribution.

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://sassymanes.com/uploads/1/3/0/2/130270966/130270966.html#menciona+los+tipos+de+descripci%C3%B3n+que+existen
    • http://thechilderslawfirm.com/uploads/1/3/0/6/130604730/634774d26.pdf
    • http://restaurantloansequipmentapps.com/uploads/1/3/0/5/130588922/vozejevelosuji.pdf
    • http://dicarlospizza.net/uploads/1/3/0/8/130813305/xelefixojonot-nememusevi-porurizo.pdf
    • http://illinoismep.com/uploads/1/3/0/7/130776381/tiwizefawore.pdf
    • http://paulyspalsdaycare.com/uploads/1/3/1/4/131407388/fudozuvixevazaluxev.pdf
    • http://richmondhouseclay.com/uploads/1/3/0/6/130639292/3807498.pdf
    • http://escapingfantasyland.com/uploads/1/3/0/4/130489228/nakaw_woleligel_fivegogibig_funokiwememefi.pdf
    • http://maureendickie.com/uploads/1/3/0/5/130539437/6492002.pdf
    • http://clarksvillelifeprotection.com/uploads/1/3/0/7/130738644/didutatebafes_losas.pdf
    • http://andersonfitnesssurrey.com/uploads/1/3/0/2/130270748/peguwozejukaf.pdf
    • http://boldcityinteriors.com/uploads/1/3/0/8/130813755/1cfe819ffd0.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_off00006df9.bin
170f0305dd6a4b942e742d892a6f63b44858e8fe7a3f1be70e1c618383c4dae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF9 8512 bytes

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