Malicious PDF — malware analysis report

Static analysis result for SHA-256 e38cc0c79bc02f0f…

MALICIOUS

PDF

62.2 KB Created: 2020-05-03 11:43:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b211b7c974adc93315a347cdf8e388e3 SHA-1: 85366453b323d57194cdc84112b082bc4654381f SHA-256: e38cc0c79bc02f0f1f12f1d405f1f245f84e7cb85065d220a9f81359ed70b5a6
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9816

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://theinternationalreikiregistry.com/uploads/1/3/0/9/130969939/130969939.html#bootstrap+form+row+margin
    • http://tricityadvertisingcandy.com/uploads/1/3/0/4/130489123/1175451.pdf
    • http://cutbows.com/uploads/1/3/0/4/130476818/sozipa-gutasube-kubukifage-fudoxutunesuguw.pdf
    • http://rockstarsbiz.org/uploads/1/3/0/3/130323445/2f1af94ae.pdf
    • http://letsgoministries.com/uploads/1/3/1/4/131406114/64f4c5104bd.pdf
    • http://viczoart.com/uploads/1/3/1/3/131383743/4588449.pdf
    • http://monkey84.com/uploads/1/3/0/2/130289288/vovixi-fufudovazedapef-joturuzab.pdf
    • http://retreatonlonemancreek.com/uploads/1/3/0/6/130640021/rageboxoni_juvuzikosu_soreta_wefato.pdf
    • http://bisonwoodscolorado.com/uploads/1/3/0/9/130969727/5814156.pdf
    • http://creativescentonline.com/uploads/1/3/1/4/131406211/1977760.pdf
    • http://pelletstoveguy.com/uploads/1/3/1/3/131379698/pelitufonidibeluxiw.pdf
    • http://foreignfieldsmusic.com/uploads/1/3/0/6/130639691/sivewokesodiroja.pdf
    • http://astitchoffaith.com/uploads/1/3/0/6/130639729/timit.pdf
    • http://tvea.us/uploads/1/3/1/3/131383744/fiwanufaxefugevaguv.pdf
    • http://greatlakeselectricohio.net/uploads/1/3/0/8/130813577/b722c1a4137ec44.pdf
    • http://askbrookesheanswers.com/uploads/1/3/0/4/130436007/zuwuwen.pdf
    • http://clipsla.com/uploads/1/3/1/4/131408970/tovidexix.pdf
    • http://otsegostreethomes.com/uploads/1/3/1/4/131414134/fazam-dufimugudo-larajoxe-mobise.pdf
    • http://conservasource.com/uploads/1/3/0/8/130813701/46c006e12a.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00005732.bin
e8a9b702c76a19332494dbc976d7a174b75fcf7b503e2e370cbb2837aecfb3bd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5732 43676 bytes
font_01_sfnt_off0000dc4e.bin
7fb4ef8698888ea74ec1061df4404d75157d78912f06d6ad6fb3d8f0111e4e4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4E 9784 bytes

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