Malicious PDF — malware analysis report

Static analysis result for SHA-256 90857a9777474df0…

MALICIOUS

PDF

103.4 KB Created: 2020-04-04 07:53:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6d85cff1a247a72dc7f9c7d524256473 SHA-1: effbe0737ce5276995ab3f8b2e94776eec6cd082 SHA-256: 90857a9777474df06c0d1b28b8dcae2359840dc8cb354879b0331c593b945829
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though heavily obfuscated, contains a reference to 'Othello book review pdf' and a URL, suggesting a lure to external content. The primary purpose appears to be SEO manipulation or directing users to potentially malicious sites.

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://mychoicemedicalpractice.com/uploads/1/3/0/2/130273803/130273803.html#othello+book+review+pdf
    • http://creditfromhome.net/uploads/1/3/0/5/130539888/fudekafudibawubus.pdf
    • http://dvecchiodesign.com/uploads/1/3/1/4/131408788/122c6970a0cf405.pdf
    • http://eliteretirementsolutions.com/uploads/1/3/0/7/130776300/3145640.pdf
    • http://lackhack.com/uploads/1/3/0/8/130873769/cac5b2c407f.pdf
    • http://spellboundcollies.com/uploads/1/3/0/5/130546036/6981010.pdf
    • http://redit-ma.com/uploads/1/3/0/7/130738936/e7880.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_off00017213.bin
657805c0ffb04623dc220fd5342b06f0c248591c686f6ca5ffbf512ef9136c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17213 7852 bytes

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