Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b21a0143c384309…

MALICIOUS

PDF

36.7 KB Created: 2020-03-29 09:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b50a6f5dd4c66a5dedfa753e245ec453 SHA-1: bf4ba21d9b4ee5577b33f10cfda88eb36f355b69 SHA-256: 2b21a0143c384309845e983e75033198974d9e1bb4d8ed8be0a6184976e266dc
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links suggests an attempt to manipulate search engine results or redirect users to potentially harmful content.

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://sustainablesuburbancommunities.com/uploads/1/3/0/6/130639600/130639600.html#mayor+menor+o+igual+en+excel
    • http://actscommunitychurches.com/uploads/1/3/0/6/130620902/danalup.pdf
    • http://mx.sfkmemphis.com/uploads/1/3/0/7/130739132/matematulutajo-jodoz.pdf
    • http://stoonic.com/uploads/1/3/0/5/130551417/fbc633c061d.pdf
    • http://chipsmix.com/uploads/1/3/0/5/130590163/kosil.pdf
    • http://victoryhealthcarepartners.com/uploads/1/3/0/4/130436367/6123106.pdf
    • http://emscookies.net/uploads/1/3/0/4/130436095/d94ef0af97d.pdf
    • http://haverhilldogwalkers.com/uploads/1/3/0/5/130551554/f9f2fdcbf128d0.pdf
    • http://ardorbrio23.net/uploads/1/3/0/4/130483266/2225574.pdf
    • http://mail.davisbaybc.com/uploads/1/3/0/5/130540714/586985.pdf
    • http://pinkhomeloans.com/uploads/1/3/0/5/130589048/pumudukijonalubilez.pdf
    • http://weldonandallen.com/uploads/1/3/0/2/130271081/40e0918d.pdf
    • http://pnxpartners.com/uploads/1/3/0/4/130483741/bexesu_nirupif_rorereteri.pdf
    • http://covenantchristianity.com/uploads/1/3/0/5/130546971/3b2b0.pdf
    • http://christinawei.com/uploads/1/3/0/2/130289521/timaborokesatabi.pdf
    • http://asbuiltinformer.com/uploads/1/3/0/7/130738794/polegufigunapi.pdf
    • http://capitalwestcali.com/uploads/1/3/0/7/130776725/fotiw-kosumokat-watejeruv-bedezage.pdf
    • http://roelandstrading.com/uploads/1/3/0/4/130488227/af456e.pdf
    • http://kathleenokeefegaligher.com/uploads/1/3/0/6/130620172/tofedavoparik.pdf
    • http://grace-4-life.com/uploads/1/3/0/6/130640114/9431820.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_off00006312.bin
f6b68f0c1acca8ff551068b21fdfa0db3748266f13389a32871466be37b1aa8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 9024 bytes

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