Malicious PDF — malware analysis report

Static analysis result for SHA-256 800f03d6e153a3b7…

MALICIOUS

PDF

37.4 KB Created: 2020-04-14 15:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2bda8c08fcc87a993dd31e5c34391c72 SHA-1: 668c940f5fce9c08a6d4c64ef40928e756e07bfe SHA-256: 800f03d6e153a3b70a869f1d6bbf28469eb4f70ce396989276b242f07fd5e72a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of external links, many of which point to other PDF files on various domains. This behavior is indicative of a link farm or a distribution network designed to host or redirect to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, limiting the ability to determine specific payload delivery mechanisms.

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://henrymohrpta.org/uploads/1/3/0/5/130542710/130542710.html#avatar+film++rajesh+khanna
    • http://mail.claragassiot.com/uploads/1/3/1/4/131454098/a0ba8ff7fa.pdf
    • http://raincarrying.com/uploads/1/3/0/9/130969764/tetotorebig.pdf
    • http://baldwinbuildersva.com/uploads/1/3/0/3/130323513/xedoseguwot-kenomawe.pdf
    • http://atxrealty737.net/uploads/1/3/0/6/130620443/11c4db9.pdf
    • http://childrensyogacincinnati.com/uploads/1/3/0/7/130739682/boxuwuniripipe.pdf
    • http://jodistaszakmarriageandfamilytherapist.com/uploads/1/3/1/6/131606454/kisunewuner.pdf
    • http://livelief.com/uploads/1/3/1/0/131070237/284744.pdf
    • http://scenarscot.com/uploads/1/3/1/4/131406505/marudajamixem_xiwinasujufa_mefub_gumaku.pdf
    • http://smittysews.com/uploads/1/3/1/4/131406663/nogajederugad-jekedurimo.pdf
    • http://zahnallianz.info/uploads/1/3/0/5/130551002/jilasanebitimaj-jawilolusus-leletepa-ponodovisu.pdf
    • http://gratefulgreenhouse.net/uploads/1/3/0/2/130272443/94a893cc6eed.pdf
    • http://areastrategy.com/uploads/1/3/0/2/130271145/6075521.pdf
    • http://newgrowthmontana.com/uploads/1/3/1/4/131410597/1f8c1c.pdf
    • http://tricicloproducciones.com/uploads/1/3/0/2/130289213/f2813052fa9b7.pdf
    • http://gratefulgreenhouse.net/uploads/1/3
    • 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_off0000697e.bin
a6044ed1262dcb167ff31adb9e11abd96559e818c015c93817f75dbb00099fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697E 7792 bytes

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