Malicious PDF — malware analysis report

Static analysis result for SHA-256 d638edd6fc38bf5a…

MALICIOUS

PDF

45.5 KB Created: 2020-04-18 21:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4d859b64e79ee50a4f1e1e1424631ddc SHA-1: c58e13ece7118b29965f1661251a9e279a3d3925 SHA-256: d638edd6fc38bf5a3eaf97bbdf212413296087b480dd6c3b8bfe777b5ce040be
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 similarly structured URLs on different domains. This pattern is indicative of a link farm or SEO spam campaign designed to drive traffic to potentially malicious or deceptive content. The document body, though heavily obfuscated, contains text related to 'Feasibility study excel worksheet', suggesting a lure to trick users into clicking the 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://bigdsuperfoods.com/uploads/1/3/1/4/131453251/131453251.html#feasibility+study+excel+worksheet
    • http://alxconstruction.net/uploads/1/3/0/6/130620387/kasujudesujifi.pdf
    • http://nicolenedley.com/uploads/1/3/0/5/130545633/5138528.pdf
    • http://kingdomdetail.com/uploads/1/3/1/4/131455508/5528056.pdf
    • http://hartmanandolson.ca/uploads/1/3/0/7/130776267/fumijuruk.pdf
    • http://mindregard.net/uploads/1/3/0/3/130313494/nukibakox.pdf
    • http://ericlukefilm.com/uploads/1/3/0/6/130622084/1741877.pdf
    • http://greenmeadowsfarms.org/uploads/1/3/0/5/130543262/lirebobos.pdf
    • http://flysamba.com/uploads/1/3/0/7/130739315/rabemux.pdf
    • http://csj-msstate.com/uploads/1/3/0/6/130639776/e59c923b2dc3e.pdf
    • http://my800waterdamage.com/uploads/1/3/1/3/131383727/12c084f7c.pdf
    • http://northeastemergencyconsulants.com/uploads/1/3/1/4/131438693/4288415.pdf
    • http://tenzon.org/uploads/1/3/0/5/130539597/janexovaxo.pdf
    • http://rlasfoundation.com/uploads/1/3/0/6/130640084/tenutiwoxidinaw.pdf
    • http://ericlukefilm.com/uploads/1/3/0/6/130622084/17418
    • 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_off000087d4.bin
2516185cea6c4771188a65600f830bf6c1edb07baa940ed0d107c05ffc407c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D4 8884 bytes

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