Malicious PDF — malware analysis report

Static analysis result for SHA-256 2714c474db0506db…

MALICIOUS

PDF

43.3 KB Created: 2020-04-11 00:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a380fa1a6c1a29162b96e12dd02cb55f SHA-1: 7b9b166fb1e451e439cc4ae2da5cce55b538a7be SHA-256: 2714c474db0506db1d254555a3ab0f7f078cf468be5c486023b8e1a3329bd53c
92 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains text suggesting it is a 'Buick century repair manual pdf', which serves as a lure to entice users to click on the malicious links. The ML classifier strongly indicates maliciousness, and the presence of multiple unknown external URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://shopbelfast.info/uploads/1/3/0/5/130546645/130546645.html#buick+century+repair+manual+pdf
    • http://scaredtosacred.info/uploads/1/3/0/6/130621554/65434119.pdf
    • http://bellinghambc.org/uploads/1/3/1/4/131453216/togudirogox-bebeles-wudorufo.pdf
    • http://widowcoachingwidows.com/uploads/1/3/0/2/130271259/1174538.pdf
    • http://youinchrist.com/uploads/1/3/1/4/131452750/mikogixaj.pdf
    • http://geo-centric.co/uploads/1/3/1/3/131383837/1656647.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a90.bin
3c60661fcea268314e38780a2bcd7695a93844c5d40216bb6bad8916b3b88aaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A90 8824 bytes
font_01_sfnt_off00008c26.bin
f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C26 16204 bytes

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