Malicious PDF — malware analysis report

Static analysis result for SHA-256 defe77965347b9cc…

MALICIOUS

PDF

46.4 KB Created: 2020-03-29 21:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b927ffab4a2750bd65a7260d8df5d37f SHA-1: 9b711c0284f7e80e8d2229d58116aebac533bb7c SHA-256: defe77965347b9ccc2bfaf74c058fb30d5c330252c61ca8ce1bdf4e9baf93452
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, many of which follow a pattern of numeric slugs and are hosted on newly created domains. This behavior is indicative of a link farm or SEO manipulation tactic, often used to distribute malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

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://woodlandstuition.com/uploads/1/3/1/3/131379685/131379685.html#formula+de+longitud+en+quimica
    • http://covenanthealthcareservices.com/uploads/1/3/1/0/131070847/kabesesatafurakinaxa.pdf
    • http://lovejoylegal.com/uploads/1/3/1/3/131398444/0fe860e6193c.pdf
    • http://dogberrytheatre.org/uploads/1/3/0/6/130640015/ramanoko_jemewumufudepa_wifeveboxox_ruvidovez.pdf
    • http://bach-institut.ch/uploads/1/3/0/7/130775118/675d91aee2bc.pdf
    • http://multifamilygroup.net/uploads/1/3/1/1/131163616/9484529.pdf
    • http://theworldunplugged.org/uploads/1/3/0/4/130476216/4907262.pdf
    • http://rossellcicservicesllc.net/uploads/1/3/1/3/131380163/jenijubeni-nefejovofeb-wigepesaxamezi.pdf
    • http://robynvalerieprice.com/uploads/1/3/0/8/130873801/31b3f06429cb.pdf
    • http://myspend.net/uploads/1/3/0/7/130739696/lumotabut.pdf
    • http://nannytherapy.net/uploads/1/3/0/6/130620362/tuzuvud-xesewabipubeja-walanusowoxomek-rixadutetaz.pdf
    • http://szjsolutions.com/uploads/1/3/0/5/130550951/jezuxa.pdf
    • http://mk-shots.com/uploads/1/3/1/4/131438188/zesiluneke_bevululilosokaw_mijolizixepevuj_tanub.pdf
    • http://flowergurlz.com/uploads/1/3/0/6/130603810/gufofofegodoxu.pdf
    • http://dunaewilliams.com/uploads/1/3/0/4/130476978/fejali_monegusinuga_bedelogojuginig_gaduxeko.pdf
    • http://gavehgani.com/uploads/1/3/0/5/130588786/nuzef_pabitil.pdf
    • http://beyoutifullymademh.com/uploads/1/3/0/2/130272250/753954.pdf
    • http://kjeemusic.com/uploads/1/3/0/6/130639566/4803f25ca4c9c3b.pdf
    • http://strategicinsightadvisors.net/uploads/1/3/0/5/130545681/8946643.pdf
    • http://londontideway.org/uploads/1/3/0/6/130621900/tulezivitede.pdf
    • http://freerangefouchefamily.com/uploads/1/3/0/4/130477293/9e0db7978a1.pdf
    • http://susandumett.com/uploads/1/3/0/4/130476378/2039051.pdf
    • http://realtalkwithricki.com/uploads/1/3/0/4/130478244/570338.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_off000073ce.bin
3f36f693b0792d831bf6037de53f895174a982b70a1f24645c318cf947fae525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73CE 9788 bytes
font_01_sfnt_off00009662.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9662 16204 bytes

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