Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd80781988a4d4fa…

MALICIOUS

PDF

30.6 KB Created: 2020-04-07 09:24:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 49a37dabde1ca95bc57e35bc6c1c83d6 SHA-1: 9f630ca0a6b70621ffbdcfe0db21b4a22c443d9f SHA-256: bd80781988a4d4fa9787b8857d098d46a6cd8f31b87233e1941b5e0ee65864a1
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The document body, though heavily obfuscated, contains a URL that appears to be part of this link farm. No scripts were extracted, and the primary malicious activity observed is the distribution of numerous external links.

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://nomoreheroesnovel.com/uploads/1/3/0/4/130436224/130436224.html#comprehensive+medical+terminology+5th+edition+answer+key
    • http://socaljobs.net/uploads/1/3/1/3/131381302/wusiwa_bebixig_sebejodafig_voxozupawakose.pdf
    • http://refinternational.org/uploads/1/3/0/6/130621765/mesevomeg.pdf
    • http://trakdavis.com/uploads/1/3/1/0/131070258/a2a38a88.pdf
    • http://keystosuccessstrategygroup.com/uploads/1/3/0/7/130739379/xixuwa_nifuv_pabilurasujixar.pdf
    • http://learningselflove.com/uploads/1/3/0/4/130476624/831f0228ddfcd.pdf
    • http://lamethodewinningpitch.com/uploads/1/3/1/3/131398542/2932323.pdf
    • http://saferockford.org/uploads/1/3/1/4/131453456/730126.pdf
    • http://earthquakesafety101.com/uploads/1/3/0/5/130589159/3569510.pdf
    • http://thefairbankagency.com/uploads/1/3/1/4/131409508/volizidonosorex_fololut_dinoxin.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_off000050cc.bin
fed883566adbebd6ea42f5c5757368993f8345822f978ff78e0a28220ed771e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50CC 7304 bytes

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