Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff6b6b3803752a8…

MALICIOUS

PDF

33.9 KB Created: 2020-05-20 16:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdeaded0cbeca40e8561c51e34dbb464 SHA-1: 95bd3ee3d9bcac0f8a463af3f1c5353133bae331 SHA-256: eff6b6b3803752a8ab55ce98792da26b3f01d97da7e383497f6ab4af5d423854
92 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains a URL, 'http://distancelearningtoday.net/uploads/1/3/0/3/130323430/130323430.html#play+nintendo+64+games+online+free', which appears to be a lure. The ML classifier strongly indicates maliciousness. The primary attack pattern involves directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://distancelearningtoday.net/uploads/1/3/0/3/130323430/130323430.html#play+nintendo+64+games+online+free
    • http://vintage-pop.store/uploads/1/3/0/7/130776257/dezogegotepaf_tumenegu_kapijumaf_jidewobupupefat.pdf
    • http://lustbynisha.com/uploads/1/3/0/3/130323185/miduwoji.pdf
    • http://vocesintimaeartsong.com/uploads/1/3/0/6/130621702/xatuzewotez.pdf
    • http://ourplexuslife.net/uploads/1/3/0/8/130814680/vuxoworaz.pdf
    • http://omarysuli.com/uploads/1/3/1/8/131857626/4034891.pdf
    • http://doctorbrasher.com/uploads/1/3/0/6/130639905/vezinefubevotogi.pdf
    • http://calyculin.com/uploads/1/3/0/8/130874642/voreluroluwurex-juzuwapobu-mobanes.pdf
    • http://nolancunningham.net/uploads/1/3/1/4/131438899/3890760.pdf
    • http://byucommercialmusic.com/uploads/1/3/1/8/131857252/zejovasesewubusi.pdf
    • http://houseofmooi.info/uploads/1/3/1/4/131453526/botaletorilori_waromasowawi_lixesezofo_lelekorufit.pdf
    • http://peacevine.net/uploads/1/3/0/7/130775983/c8ae7ff0a1efd8.pdf
    • http://obgaragedoors.com/uploads/1/3/0/7/130740391/2067703.pdf
    • http://dayafterkatyn.com/uploads/1/3/1/3/131398193/wukizuputim.pdf
    • http://circlekmfg.com/uploads/1/3/0/6/130639358/6519241.pdf
    • http://jessumbuds.com/uploads/1/3/0/6/130620515/kawiwosisawe-ridovurotutamil-goziga-bazepes.pdf
    • http://catherininaskitschin.com/uploads/1/3/0/5/130589281/6400151.pdf
    • http://hbtgraphics.com/uploads/1/3/0/7/130775456/6649754.pdf
    • http://alarconconstructionllc.com/uploads/1/3/0/2/130271087/kajof-gabolibaxuvika.pdf
    • http://dropoak.com/uploads/1/3/0/5/130588850/1838186.pdf
    • http://suzyscupcakes.com/uploads/1/3/0/5/130588710/95d70.pdf
    • http://koinlando.com/uploads/1/3/0/5/130590122/gojawaposurupe_jonuvok.pdf
    • http://misfitcrusaders.com/uploads/1/3/1/6/131637921/minuxira_febuzutita.pdf
    • http://murphdawgblawg.com/uploads/1/3/0/4/130435807/kilekuvoxawurak_zekorerusesa.pdf
    • http://bethmccash.com/uploads/1/3/1/1/131164377/9362055.pdf
    • http://9f60ljd506.com/uploads/1/3/1/4/131406893/9987448.pdf
    • http://9f60ljd506.com/uploads/1/3/1/4/
    • 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_off00005e53.bin
234dcf1f8b991854dee2d3d0e37558b2a0741017a66ca35d71ab03345699f8ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E53 8524 bytes

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