Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00e0aedde7d68a4…

MALICIOUS

PDF

38.6 KB Created: 2020-05-06 13:20:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a9943878229311786feb33037b3e9448 SHA-1: cf7ccafe9984310d3b068d2ffe81f7920cb5e915 SHA-256: a00e0aedde7d68a470462770b2466e67d989ff961b366a616a9b61c074964ca8
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, indicating a mass of external PDF links. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample, and the document body is heavily obfuscated, but the presence of numerous links to other PDF files suggests a delivery mechanism for potentially malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bwsinvestments.com/uploads/1/3/0/4/130435581/130435581.html#naruto+sadness+and+sorrow+violin+mp4
    • http://mydearestbaby.com/uploads/1/3/0/2/130272571/wetatol.pdf
    • http://antonymbrown.com/uploads/1/3/0/8/130874339/3085250.pdf
    • http://urbanrelic.com/uploads/1/3/0/5/130551303/newiwe.pdf
    • http://hbeatz.com/uploads/1/3/0/9/130969628/720862.pdf
    • http://fivestatesbank.com/uploads/1/3/0/8/130873983/453fee135a3.pdf
    • http://norelievesound.com/uploads/1/3/0/5/130551006/cba55b.pdf
    • http://cochranepetsitting.com/uploads/1/3/0/7/130739809/5548549.pdf
    • http://banginhardfireworks.com/uploads/1/3/1/4/131437823/rajuluwelulibulu.pdf
    • http://latinosentuszona.com/uploads/1/3/1/4/131452947/tolapewinowafu_zelepubawodef.pdf
    • http://dynamichomecareinc.org/uploads/1/3/0/7/130776682/zimipo-nawivanipo-mesariwugogit-musazotiragib.pdf
    • http://rockhilltowncenter.com/uploads/1/3/0/5/130550980/e473b523.pdf
    • http://occapto.org/uploads/1/3/0/5/130539584/9326b9711a2.pdf
    • http://zipsmobilewash.com/uploads/1/3/1/4/131454264/rajuvozexiti.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off00006a76.bin
c1ce4cb53ff3658e4cea42c8b82cc0f2950379939f12ff857c994859a04b2aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A76 11344 bytes

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