Malicious PDF — malware analysis report

Static analysis result for SHA-256 5484cee32716a9c3…

MALICIOUS

PDF

45.2 KB Created: 2020-03-15 03:38:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ba8eaa367c8870feb48c0bbebbb47202 SHA-1: b0bbb5505c611743c43dd70402e4f012f55cd723 SHA-256: 5484cee32716a9c3620a3650c4f2f9bd0b89a12f877a7c96778abf6c0558d2e4
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 various domains, indicating a link farm or SEO abuse tactic. The primary URL http://71-159-221-57.overtimefitness.com/uploads/1/3/0/2/130271229/764706.pdf appears to be the initial lure. The heuristic PDF_SEO_LINK_FARM firing confirms the presence of a mass external PDF link farm, suggesting a coordinated effort to distribute malicious content or traffic. The ML classifier also strongly indicates maliciousness.

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://71-159-221-57.overtimefitness.com/uploads/1/3/0/2/130287514/130287514.html#falmouth+10+day+weather+report
    • http://akesomedicalsolutions.com/uploads/1/3/0/6/130639935/rupeti_migaza.pdf
    • http://mudassarshah.com/uploads/1/3/0/2/130272579/nobutebifexunaw.pdf
    • http://hervek.com/uploads/1/3/0/9/130969984/dupojotetezijajovix.pdf
    • http://awinspection.net/uploads/1/3/0/9/130970022/1076436.pdf
    • http://nataliashand.com/uploads/1/3/0/6/130604769/c0c26f5.pdf
    • http://royallyicedout.com/uploads/1/3/0/3/130323513/bd2af.pdf
    • http://colonialcpchurch.org/uploads/1/3/0/2/130271229/764706.pdf
    • http://jennifertuten.com/uploads/1/3/0/4/130488816/vedumajek.pdf
    • http://cdconline.store/uploads/1/3/0/5/130550998/7574292.pdf
    • http://www.writerswithroomtobloom.com/uploads/1/3/0/7/130739894/8044740.pdf
    • http://afgtrainers.com/uploads/1/3/0/5/130539235/xewimetemul.pdf
    • http://angelasoffice.com/uploads/1/3/0/3/130379529/9d6c121ad.pdf
    • http://whiteevents.net/uploads/1/3/0/5/130551671/3001215.pdf
    • http://netliving.com/uploads/1/3/0/2/130289308/7aa4c6fd1ef9c9.pdf
    • http://infobiquity.com/uploads/1/3/0/6/130604090/zonek.pdf
    • http://mail.nycancerfoundation.org/uploads/1/3/0/6/130639310/8001724.pdf
    • http://cpanel.phaseonedismantlingservices.com/uploads/1/3/0/6/130605519/katovunowu-somoderun-talugalupa.pdf
    • http://12741homanavenue.com/uploads/1/3/0/3/130313309/676c2dcf1911e.pdf
    • http://wildchildcraft.studio/uploads/1/3/0/4/130488476/9f1e252.pdf
    • http://www.cardilegal.com/uploads/1/3/0/6/130620782/7b55e848f1.pdf
    • http://buildingonbookspodcast.com/uploads/1/3/0/7/130739488/750442.pdf
    • http://www.scrubscaffeineandchaos.com/uploads/1/3/0/7/130739194/vaxozutenupul.pdf
    • http://jacobapffel.com/uploads/1/3/0/6/130620453/2006624.pdf
    • http://waybackwrestling.com/uploads/1/3/0/3/130313595/numeroni-joretaf.pdf
    • http://theclickables.com/uploads/1/3/0/6/130604342/b439587da.pdf
    • http://theclickables.com/uploads/1
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000696d.bin
e98f01f8cea0ead05b99f2f2f1f3012526b49fd51138b608a8a13f934afee8d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 7988 bytes
font_01_sfnt_off000087ae.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87AE 2652 bytes
font_02_sfnt_off00009115.bin
6ddf53b883350c964210757953e72edacca849803b95280767352c6c691d264d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9115 16060 bytes

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