Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f98eeeb02e1c5d9…

MALICIOUS

PDF

45.8 KB Created: 2020-03-30 03:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a2bc3ad44388b58735146f895ce5ddd3 SHA-1: 37df721362574c81f86d2feba948500b58b536cc SHA-256: 2f98eeeb02e1c5d9f641fa8df32160d705fdac4c6fb5089c89fd875df8809c3d
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed link farm behavior. No scripts were extracted, and the document body text is largely unreadable, but the extensive external linking is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://annotalegal.com/uploads/1/3/0/5/130540155/130540155.html#definicion+formal+de+limite+en+calculo+diferencial
    • http://gondolaclothingsupplyllc.com/uploads/1/3/1/1/131164205/71617.pdf
    • http://heyitstaay.net/uploads/1/3/0/6/130620602/2139928.pdf
    • http://lifisupply.com/uploads/1/3/0/4/130489052/nelatukiwisotugusege.pdf
    • http://idelisserodriguez.com/uploads/1/3/0/4/130435785/bepegofowajibo.pdf
    • http://redraygun.com/uploads/1/3/0/5/130589297/5cae3d86f15.pdf
    • http://rkaydia.com/uploads/1/3/0/6/130639885/nusub_fafaxovavoxore_garokavedefe_miwetiget.pdf
    • http://blueskykls.org/uploads/1/3/0/8/130814805/jugefezodurib.pdf
    • http://pulhe.net/uploads/1/3/0/5/130551343/8767f05c3.pdf
    • http://sacramentofenceguy.com/uploads/1/3/0/9/130969597/fc175342eb.pdf
    • http://dariablond.com/uploads/1/3/0/6/130639960/wujapibopodim_novakuzikin.pdf
    • http://northwalestimberframes.com/uploads/1/3/0/6/130604541/dajumabelin_zofoni_kevovowomutunu_xezikamejemori.pdf
    • http://derekzhang.net/uploads/1/3/0/8/130814586/260ba09dd85.pdf
    • http://projectdrawings.com/uploads/1/3/0/7/130739258/3673586.pdf
    • http://ssjohn832.com/uploads/1/3/0/2/130289755/168d17c2155d.pdf
    • http://drugfreeharrisoncountywv.org/uploads/1/3/0/6/130640220/zalosobezozox.pdf
    • http://lewisandclarkriverboat.org/uploads/1/3/0/6/130620794/gesemebasaf_xipajel_zozovo_nexus.pdf
    • http://anfieldadvisors.net/uploads/1/3/0/2/130287419/xowitufiro-nomexapuv-dufakas.pdf
    • http://bardosdiamondsports.com/uploads/1/3/1/0/131070597/zuvapobo-kokugopeji-jujaguvekef-rodomiv.pdf
    • http://unboringsnackcompany.com/uploads/1/3/1/1/131164171/fuzerolizuvabik.pdf
    • http://miamihomes.xyz/uploads/1/3/0/2/130273798/7503630.pdf
    • http://barcorealtyofstaffordva.com/uploads/1/3/0/3/130379222/c6c8cd59f8f.pdf
    • http://christvictoriousliferecovery.net/uploads/1/3/1/1/131163734/zexinuto.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bea.bin
7cd77f7e287fa3756fbefa68635ef635fc021debfa5da27e30a3c100abba85a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEA 8656 bytes
font_01_sfnt_off00009bc7.bin
c1aadbb6ca343b431a9280724aaee45f1e9a1853df40d5e300a1cd8a5544a912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC7 3176 bytes

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