Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c6038cccbcbd19…

MALICIOUS

PDF

35.4 KB Created: 2020-04-03 05:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: df3237a62c61237a676318ac9b3ea252 SHA-1: e48a55eab82a9806bc6ffe8afa2a2cd501f7524d SHA-256: 10c6038cccbcbd1906d9baf2dea4aa7b5970014be1538a9a514b292f4142f91e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file exhibits characteristics of a link farm, containing numerous external links to other PDF documents hosted across various domains. The ML classifier strongly indicates maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass of external links. While no scripts were directly extracted, the structure suggests an attempt to manipulate search engine results or redirect users to potentially malicious content. The primary IOCs are the numerous external URLs embedded within the document.

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://todaycounts.org/uploads/1/3/1/1/131164160/131164160.html#espacio+muestral+para+3+dados
    • http://welldarn.com/uploads/1/3/0/4/130436258/jaziridex-japolugujagiva.pdf
    • http://seafivecinches.com/uploads/1/3/0/2/130289365/tozeto.pdf
    • http://newmarketcrossfit.com/uploads/1/3/0/5/130551986/c26ca1212.pdf
    • http://jimdavisteam.com/uploads/1/3/1/4/131437876/xizaxere.pdf
    • http://kathrinesteele.com/uploads/1/3/0/9/130969718/cec9d4d.pdf
    • http://maxleo.org/uploads/1/3/0/2/130272282/xibigovodil.pdf
    • http://panteiamodas.com/uploads/1/3/0/6/130639129/f47bf43a2803a.pdf
    • http://ironelectricinc.com/uploads/1/3/1/0/131070688/9690937.pdf
    • http://cr8iveartsphotography.com/uploads/1/3/1/1/131163930/rereridew_dunusup_kiwexuroberaw.pdf
    • http://mfranjo.com/uploads/1/3/0/4/130436525/3774639.pdf
    • http://sacredpausebodywork.com/uploads/1/3/0/6/130604083/pezawisobago.pdf
    • http://allnationsinsuranceinc.com/uploads/1/3/0/7/130776682/bavafexumumoj.pdf
    • http://iventureemsys.com/uploads/1/3/1/4/131407439/mutekuf-vunazarina-mojubitaxujud.pdf
    • http://remitway.com/uploads/1/3/0/7/130775462/pakeviribofe_vimukuburadu_koviwoxaz_dolemomexele.pdf
    • http://afraidtosay.org/uploads/1/3/0/6/130621829/4868347.pdf
    • http://mail.haze.company/uploads/1/3/0/9/130969312/lexer.pdf
    • http://supremacytlcs.com/uploads/1/3/0/7/130739682/wotiz.pdf
    • http://gainmobilitynorwich.com/uploads/1/3/0/8/130814652/9069798.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a3a.bin
ebc75d8b1f5ec87e3f38fde272745ea2e47eaf504cca58792eb683048494b864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3A 7296 bytes
font_01_sfnt_off0000764c.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x764C 2652 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.