Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dbddf24031a82c…

MALICIOUS

PDF

35.5 KB Created: 2020-04-11 08:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 056973360bd178ca873a38ba23eebe73 SHA-1: 41d4baa4afaa081785d4fb4491416ba7ff90210f SHA-256: 51dbddf24031a82ca90b90f81f72fbfa0f5ecdc272ad45c993abd9849745cd3e
92 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing a large number of external URLs pointing to other PDF files. The primary heuristic 'PDF_SEO_LINK_FARM' indicates this is a deliberate technique to generate SEO traffic or distribute malicious content. The embedded URL 'http://74-123-76-212.mgwnet.com/uploads/1/3/0/9/130969037/130969037.html#les+ronds+en+maternelle' is also suspicious and likely part of this distribution network. No scripts were extracted, limiting the analysis of direct payload execution.

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://74-123-76-212.mgwnet.com/uploads/1/3/0/9/130969037/130969037.html#les+ronds+en+maternelle
    • http://thesociallubricant.co/uploads/1/3/0/5/130588944/feduduma.pdf
    • http://nduboisphotograph.com/uploads/1/3/0/4/130490875/bebobexavogakibem.pdf
    • http://virginiawinegypsy.net/uploads/1/3/0/5/130551427/43ceae3e6726.pdf
    • http://rebeccalynnjewellery.com/uploads/1/3/0/4/130488968/lidozafejebesiji.pdf
    • http://shinebossautocare.com/uploads/1/3/0/8/130814254/nunopop.pdf
    • http://vinotechsolutions.com/uploads/1/3/1/0/131069961/tijixopove.pdf
    • http://borntocleanllc.com/uploads/1/3/0/3/130323602/c6eb8c2.pdf
    • http://lynnevirant.com/uploads/1/3/0/8/130873946/9413600.pdf
    • http://ramonakriggins.net/uploads/1/3/1/3/131379045/8fa426616c2.pdf
    • http://ehlon.com/uploads/1/3/0/5/130540789/jepigipabel.pdf
    • http://kaliedoscopegirl.com/uploads/1/3/0/5/130590096/5506483.pdf
    • http://apple-pi.com/uploads/1/3/0/7/130740164/3ee789f9acb.pdf
    • http://ramonakriggins.net/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_off00006054.bin
54ac35d7ba505c2195d676d81a065a439ac31567a863433901329ff07c99650e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6054 9084 bytes

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