Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95d59efc60d1c8f…

MALICIOUS

PDF

41.3 KB Created: 2020-04-04 06:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 541fefc80158ea048d0b96c1dd024fb9 SHA-1: fe9e0cb81c0b2dab2f8b6dd93a1c3f70600b7429 SHA-256: e95d59efc60d1c8f3c8bb7436b8049fc3ab6309806689f086460af77181ef848
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used to create link farms for SEO manipulation or to distribute malicious content. The document body, though partially corrupted, suggests a lure related to educational worksheets. The primary heuristic identified a link farm with numerous PDF links hosted on various domains, indicating a coordinated effort to redirect users. The IOCs are the URLs extracted from the document, which are likely part of this redirection scheme.

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://mainestead.com/uploads/1/3/1/3/131384713/131384713.html#free+division+worksheets+for+2nd+gra
    • http://myblueprintforchange.com/uploads/1/3/0/4/130475921/joderilijabun_joxaxo_malebasifa_wexewelapisixu.pdf
    • http://sharpfocuscctv.com/uploads/1/3/0/7/130739173/40bc8bd9482828.pdf
    • http://rehabnation.us/uploads/1/3/0/5/130588403/3071517.pdf
    • http://sevilleluxuryestate.com/uploads/1/3/0/6/130621829/dififalirivebib.pdf
    • http://welhealth.org/uploads/1/3/0/5/130546538/7685492.pdf
    • http://personaltransformation.ca/uploads/1/3/0/6/130605178/1987740.pdf
    • http://jilljohnsonstorybooks.com/uploads/1/3/0/6/130620272/wozulowukuxugu.pdf
    • http://hamzicphotography.com/uploads/1/3/1/1/131164136/605114.pdf
    • http://grahams-gallery.com/uploads/1/3/0/5/130539881/8806439.pdf
    • http://flickick.com/uploads/1/3/0/4/130483860/222515.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_off00006ea6.bin
22b08385f4b87635487a65b7d947ba9f2a42c8ff8e2510def52b915d0e759a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA6 8268 bytes
font_01_sfnt_off00008e9b.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9B 2652 bytes

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