Malicious PDF — malware analysis report

Static analysis result for SHA-256 93b049a4e40401c7…

MALICIOUS

PDF

46.9 KB Created: 2020-04-01 14:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c076af4f5bcd2cf867a64969169d8adc SHA-1: 83e3c919a79cd52c21e0f65d31e038a40c3d8440 SHA-256: 93b049a4e40401c70b05d812adca17f1f4dce27c42aef981e8c9e473a143766d
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains. This pattern is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly supports the malicious verdict, and the PDF_SEO_LINK_FARM heuristic confirms the suspicious nature of the embedded links.

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://cfthomas.com/uploads/1/3/0/2/130272600/130272600.html#la+palabra+publico+lleva+acento
    • http://goatplatform.com/uploads/1/3/0/7/130775015/telarabezav.pdf
    • http://blacksheepsweettreats.com/uploads/1/3/0/7/130739916/lekotuv.pdf
    • http://nourishingvibrantfigures.com/uploads/1/3/0/4/130476859/6254423.pdf
    • http://tallyuber.com/uploads/1/3/0/8/130814101/gedijilotafor.pdf
    • http://kingofpowerwash.com/uploads/1/3/1/3/131382430/kejupeki.pdf
    • http://alvarezorganicfarms.org/uploads/1/3/0/7/130738966/ed34566815a51.pdf
    • http://waimanalonobookingfee.com/uploads/1/3/0/5/130551356/wobexes.pdf
    • http://lilyseidel.com/uploads/1/3/0/5/130542907/5638547.pdf
    • http://pof-freeaddcalls.com/uploads/1/3/1/4/131438572/760d7a7d77.pdf
    • http://e-dci.com/uploads/1/3/0/7/130739524/povezodesok.pdf
    • http://happyeverydaywithsk.com/uploads/1/3/0/7/130740623/jexudedezofo-vuvejotudubobi.pdf
    • http://cavwhiskey.com/uploads/1/3/0/5/130588635/wixizafizixisum_fexamo_zafukidurekuse_veraguk.pdf
    • http://sustainableob.com/uploads/1/3/0/3/130312934/gagete.pdf
    • http://pnwroots.org/uploads/1/3/0/7/130738939/8407064.pdf
    • http://tanvirajeev.com/uploads/1/3/0/8/130815059/nekosekiwakev.pdf
    • http://beilercarpentry.com/uploads/1/3/0/3/130379133/2602291.pdf
    • http://whiteshieldcaregivers.com/uploads/1/3/0/4/130476642/nisepunefamagimol.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_off00007e90.bin
2e513e5ecf64ed61ca94f408232811a279efecfa6d35e4cad28866f2fe90c723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E90 9840 bytes
font_01_sfnt_off0000a106.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA106 4144 bytes

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