Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a4c07e6a4183c4b…

MALICIOUS

PDF

31.1 KB Created: 2020-05-16 06:32:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 940a480014ff0fc4c73eb834342b6873 SHA-1: fcf8dd78db0ebc1452e5d9673e704ff0c8e22f1a SHA-256: 8a4c07e6a4183c4b460702aeb3b6143978358732175f3d8dce1bddf069733b39
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The document body itself is heavily obfuscated and contains some of the extracted URLs, suggesting an attempt to disguise the malicious intent. No scripts were extracted from this sample.

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://masonalexandereverettinstitute.org/uploads/1/3/0/2/130291922/130291922.html#ielts+writing+answer+sheet+pdf+2018
    • http://stonesdallas.com/uploads/1/3/0/5/130551198/0ddeaba2311ac16.pdf
    • http://vitalitymedicalinfusion.com/uploads/1/3/0/5/130550712/bisoj.pdf
    • http://payperlessforms.com/uploads/1/3/0/7/130775795/tametuwalowe.pdf
    • http://my123math.com/uploads/1/3/1/4/131410736/2400176.pdf
    • http://clouthentication.com/uploads/1/3/1/3/131384489/gulug-latesaj.pdf
    • http://fieldtripuk.com/uploads/1/3/1/0/131070712/d6ad18.pdf
    • http://worldofmommytee.com/uploads/1/3/0/5/130539679/munugulaluzo-pibezo.pdf
    • http://oceanreefcheckin.com/uploads/1/3/1/4/131437173/6613254.pdf
    • http://1ststopautomotiveinc.com/uploads/1/3/0/8/130814462/ruvefo.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_off00005143.bin
37ea4c4d9cfc5e545f45ffe401938ea354cc55086de75cb230e09c91261b9ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5143 9492 bytes

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