Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb749f41fba3cc18…

MALICIOUS

PDF

43.3 KB Created: 2020-03-29 09:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c00d9f34acb138489373b02099224918 SHA-1: b7233117c5446979c871aab764851e9d0ac5f504 SHA-256: cb749f41fba3cc182e772f64af614e3a4047b0e47fc1a45a861827daf543c42f
92 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body text is largely unreadable, but the presence of numerous URLs suggests a link farm or redirection scheme, likely intended to drive traffic to malicious sites or for SEO spam. 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://madsvig.net/uploads/1/3/0/6/130604630/130604630.html#una+hora+cuantos+segundos+tiene
    • http://cinno.ca/uploads/1/3/0/6/130603944/sopujanepi_malebumazanom_fiwupubomoxisi.pdf
    • http://327seventhst.com/uploads/1/3/0/7/130775387/kejajadejini.pdf
    • http://frezhfoodtrading.com/uploads/1/3/0/6/130605074/1baf26a.pdf
    • http://americanfamilygolf.us/uploads/1/3/0/7/130775056/voginizitazal_bikegixiza.pdf
    • http://mta-sts.mail.philipperouffiac.com/uploads/1/3/0/5/130543377/6242065.pdf
    • http://hostmaster.awrc.org.au/uploads/1/3/0/2/130289173/molivafuv.pdf
    • http://exhibit-graphics.com/uploads/1/3/0/4/130483638/5312934.pdf
    • http://psvisions.com/uploads/1/3/0/6/130604993/1210177.pdf
    • http://friendsofsola.org.uk/uploads/1/3/0/7/130776208/subenosawora_xiwajeferop_verirofovu_zujojib.pdf
    • http://midwestsportingproperties.com/uploads/1/3/1/4/131438171/nekovowozisesup_fixoxizanev_fesasuj.pdf
    • http://kilosbayanihan.com/uploads/1/3/0/2/130272603/dacf83965df3.pdf
    • http://northfloridachristian.com/uploads/1/3/0/5/130588656/d5f17.pdf
    • http://whiterocklabradors.ca/uploads/1/3/0/6/130605107/be649f1f.pdf
    • http://mindkeyacademy.com/uploads/1/3/0/5/130551621/b9419.pdf
    • http://investcloudservices.com/uploads/1/3/0/6/130621758/874d2ccb41239c.pdf
    • http://lsrealty.co/uploads/1/3/0/2/130289557/poluni-jugokolexuwok.pdf
    • http://www.rsllcw.com/uploads/1/3/0/6/130621542/kexokokej.pdf
    • http://globalbrasiltrading.com/uploads/1/3/0/7/130776150/7586444.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_off00006f33.bin
59e25e696008d5c33551378bfc5a822bce207153a49aa99b526e0148d0c6d116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F33 9348 bytes
font_01_sfnt_off000090e0.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90E0 4144 bytes

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