Malicious PDF — malware analysis report

Static analysis result for SHA-256 985d5769271062c5…

MALICIOUS

PDF

33.2 KB Created: 2020-06-04 04:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b97547ee600912beed34683f39a7ab9f SHA-1: c2c16c5e0151d98ee0a263a0d8d476b25c51dba6 SHA-256: 985d5769271062c5558db6f0e2df46ebc9488a947db960c6b2c6fd48e9a48bbb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are also present in the extracted URL list, suggesting a coordinated effort to drive traffic to these sites. No scripts were extracted, limiting the analysis of direct payload delivery.

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://centralvirginiacbd.net/uploads/1/3/0/6/130605472/130605472.html#possessive+nouns+3rd+grade
    • http://xtremejoinery.com/uploads/1/3/0/5/130589114/sogogojisawovuwizaku.pdf
    • http://creative-tech.ca/uploads/1/3/0/5/130590164/326db45aea0.pdf
    • http://tourforthecure.ca/uploads/1/3/0/4/130483050/1a249.pdf
    • http://ahanihayk.com/uploads/1/3/0/5/130547884/bikuja.pdf
    • http://heartlandjoy.com/uploads/1/3/1/8/131856068/bojomidunexomejudero.pdf
    • http://mail.jaredhammer.com/uploads/1/3/0/5/130551864/wasenusamolepe.pdf
    • http://craigodesign.com/uploads/1/3/0/7/130775760/eacce3.pdf
    • http://mail.realityism.com/uploads/1/3/1/0/131070559/fizuw_ravukebidufore_dufosun_vaxirutizizep.pdf
    • http://onlinefinancieeldossier.nl/uploads/1/3/0/2/130287482/17b70428b3641.pdf
    • http://centralvirginiacbd.net/uploads/1/3/0/6/130605472/terms.html
    • http://centralvirginiacbd.net/uploads/1/3/0/6/130605472/dmca.html
    • http://centralvirginiacbd.net/uploads/1/3/0/6/130605472/policy.html
    • http://centralvirg
    • https://sozibibuji.files.wordpress.com/2020/06/42969487645.pdf
    • https://vubagojexub.files.wordpress.com/2020/06/kofivorokixesotuteda.pdf
    • https://zowolov.files.wordpress.com/2020/06/79946133930.pdf
    • https://pufikono.files.wordpress.com/2020/06/47681202737.pdf
    • https://febavimoju.files.wordpress.com/2020/06/87212406003.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_off000056dd.bin
4fc5bb55632c18dc72863250402ce3c75d624550b2531808eccc91708e4bcb28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56DD 10028 bytes

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