Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b019f19a239ab2a…

MALICIOUS

PDF

38.8 KB Created: 2020-03-29 06:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ac378c709622ffb83f9089204cef3551 SHA-1: 62a41dcd744cc64af1eca3299b89b13c60219fce SHA-256: 3b019f19a239ab2a21b86c393f9ae79a46e2708f7cee86b6c8986453c8375511
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains that appear to be part of a link farm, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, suggesting a deliberate attempt to direct users to malicious or spam content. The ML classifier also strongly flagged this PDF as malicious.

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://74-123-72-236.mgwnet.com/uploads/1/3/1/3/131383586/131383586.html#how+many+calories+in+a+dunkin+donuts+low+fat+blueberry+muffin
    • http://mywebcheetah.com/uploads/1/3/0/6/130604610/0ebba.pdf
    • http://qisma-books.com/uploads/1/3/0/5/130539774/2135424.pdf
    • http://madeinvenice.net/uploads/1/3/0/4/130489475/1437294.pdf
    • http://mayahairstonslampoetry.com/uploads/1/3/0/6/130604061/d7a08142add0417.pdf
    • http://www.fortidee.com/uploads/1/3/0/7/130739744/2887174.pdf
    • http://mail.malcolmbray.com/uploads/1/3/0/2/130270923/4328014.pdf
    • http://colleenjoanjohnson.com/uploads/1/3/0/2/130271245/2005220.pdf
    • http://kritterbitz.com/uploads/1/3/0/5/130544547/f5e9014c.pdf
    • http://www.nicolehedlund.com/uploads/1/3/0/5/130543383/mopudaxakitiwixer.pdf
    • http://www.squarebusinessconstruction.com/uploads/1/3/1/1/131164315/6784241.pdf
    • http://pcfenceco.com/uploads/1/3/0/5/130551890/karijufiropabe_lorowuvoron.pdf
    • http://marcolain.net/uploads/1/3/0/5/130588435/kuzitoja_buninetopumagej.pdf
    • http://dearmomentsphoto.com/uploads/1/3/0/7/130775354/dobinibize.pdf
    • http://fashionsavvyboutique.store/uploads/1/3/0/7/130776025/mumudokudofejowo.pdf
    • http://mta-sts.mx.eugeniamoliner.com/uploads/1/3/0/5/130550980/9852582.pdf
    • http://johnguarco.com/uploads/1/3/0/7/130739592/rerunavojawinox.pdf
    • http://bluespectrumllc.com/uploads/1/3/0/6/130621354/sunawavowafod.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cf9.bin
045b00a3b3456d5a3c2c6ada0f7aecf9d627e79f323eb4b012af988d9c6a6d1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF9 7900 bytes

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