Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6174be8ece0d7cc…

MALICIOUS

PDF

38.8 KB Created: 2020-04-16 05:39:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b7300cf877bd125c6da5f9ebc022bad9 SHA-1: 42c39283109ecc9e75937172003ab9d66ca5d13a SHA-256: e6174be8ece0d7cc4a826344f8048ed1b7dd1393964db6482d1c1a3993959ddd
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of this link farm. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://tcsonline.net/uploads/1/3/1/0/131070841/131070841.html#valve+and+transistor+audio+amplifiers+pdf
    • http://tabithatart.com/uploads/1/3/0/6/130604552/2fa1b41acd1d610.pdf
    • http://hlb-cc.com/uploads/1/3/0/5/130590191/gufeno-misin-terosi.pdf
    • http://crtmailingsystemllc.com/uploads/1/3/0/8/130874681/narezajivibobo.pdf
    • http://cynthiarichardsforohio.org/uploads/1/3/0/6/130605111/vepurulenapavopiw.pdf
    • http://koshareeagle.com/uploads/1/3/0/3/130313149/kojefulo.pdf
    • http://wiviwv.com/uploads/1/3/1/3/131380895/b803e83a6eb3.pdf
    • http://alorshomes.com/uploads/1/3/1/6/131636728/6813154.pdf
    • http://restartsolutionsgroup.net/uploads/1/3/0/6/130640178/f2dcb8907b.pdf
    • http://coachphilblack.com/uploads/1/3/0/6/130620791/nesarepubebo-robebuponobil.pdf
    • http://sinclairbrewing.com/uploads/1/3/0/8/130813913/9168484.pdf
    • http://unregisteryourgun.com/uploads/1/3/0/9/130969938/kedesedakok_nexoguv_towitotowamaw_donaxarerup.pdf
    • http://powerwashingofamerica.com/uploads/1/3/0/7/130776046/c7c0b7.pdf
    • http://ninarayviola.com/uploads/1/3/0/4/130483844/nijoketilodunebupo.pdf
    • http://nolatourhub.com/uploads/1/3/1/4/131407096/b1714d2d2e8.pdf
    • http://powerwashingofamerica.com/uploads
    • 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_off0000715c.bin
97f00e89ffcf09fc1e9dbe256b580d3fbae612b35b9ea7c05688eeab22e3c869		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715C 7516 bytes

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