Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2928371fc64ab19…

MALICIOUS

PDF

38.5 KB Created: 2020-04-01 17:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9b444e9d7bf3adf8bb83aad24c2a24eb SHA-1: 0e71090ce8b6508a537fe267f65312a24fba37e2 SHA-256: b2928371fc64ab191151afce42163e387315aac3aca4e9260945c5cdc82e1c2e
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or a redirection scheme designed to lead users to potentially malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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://alfab1.com/uploads/1/3/0/7/130739082/130739082.html#libro+de+historia+de+6to+grado+2019
    • http://faithfulmedicalsolutions.com/uploads/1/3/0/6/130620345/c361b40ed69d.pdf
    • http://cleanconfidentbalanced.com/uploads/1/3/0/5/130588703/810096.pdf
    • http://billcooperforum.com/uploads/1/3/0/9/130969953/bupujiwiwonanepug.pdf
    • http://forthepeopleinstallations.com/uploads/1/3/1/4/131453493/wesuxu_nobojatetoxobo_wunavaxova_vivubaso.pdf
    • http://nurturingabilities.com/uploads/1/3/1/3/131381302/bumofedoxofo_jemam_kunarazez.pdf
    • http://dustysbagandkitchen.com/uploads/1/3/0/6/130604856/fozodogunazawi.pdf
    • http://cincinnatikelts.com/uploads/1/3/0/4/130435982/wixanariduw.pdf
    • http://aspyremg.com/uploads/1/3/0/9/130969185/134188738.pdf
    • http://medicalmotionllc.com/uploads/1/3/0/5/130544190/wibibobinej.pdf
    • http://mindcraftcoach.com/uploads/1/3/0/6/130621765/2042008.pdf
    • http://bracefriendship.com/uploads/1/3/0/3/130323632/jemup-dudirarumawofi-mupugef.pdf
    • http://eyesofchicagooptical.net/uploads/1/3/0/7/130775137/a43fbeb29c08.pdf
    • http://accessmicropower.com/uploads/1/3/1/3/131380415/jivemumumu_zegejumumesovu.pdf
    • http://longhorncaverns.net/uploads/1/3/0/2/130288563/nezuxusapupomu-fabarajukokul.pdf
    • http://lifeafterlife.online/uploads/1/3/0/7/130776728/nixojekaxidizuxi.pdf
    • http://rockfordauctioncentre.com/uploads/1/3/0/3/130324206/27fe1fddf7d278a.pdf
    • http://cosmic-gypsy-wanderer.org/uploads/1/3/0/8/130814227/e51b014592604f.pdf
    • http://elitefeetfootcare.com/uploads/1/3/0/9/130968947/jojosine_pugabovizib_dizak_lisinaj.pdf
    • http://beabetterfoodie.com/uploads/1/3/0/2/130289369/3848134.pdf
    • http://dadecitychristianchurch.com/uploads/1/3/1/3/131380467/sawaliwag_sakelilaguf_kalug.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_off00006af4.bin
b76805d80556295822b7ee4b1b8898b2483e8e5311c4419e54fa54dc5a518f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF4 8680 bytes

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