Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fafaec1f727c27…

MALICIOUS

PDF

33.6 KB Created: 2020-04-22 13:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f6311bdca5f012035b444a67196e5974 SHA-1: 7de0db18926668d730410080908a6afc8e2785e3 SHA-256: c7fafaec1f727c275e36c17d8d2fd5834db294fdd1e8ba7e78848c5fb084c9f7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of external links, many of which appear to be part of a link farm designed to improve search engine ranking. One heuristic indicates a 'Password-protected archive handoff', suggesting the document's purpose is to trick the user into downloading and decrypting a malicious archive. The embedded URLs likely lead to further stages of the attack.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pt-mikkoraula.com/uploads/1/3/1/3/131379846/131379846.html#technicolor+modem+tc8305c+manual
    • http://jllcapitalmarkets30northlasalle.com/uploads/1/3/1/0/131070089/wefebijutevit_tewanefutase.pdf
    • http://chelsea-bruland.com/uploads/1/3/0/7/130776873/ripevufawawatix-xesonujetumuxir-lojigu.pdf
    • http://74-123-75-154.mgwnet.com/uploads/1/3/0/4/130477176/7e6ef19.pdf
    • http://heavensententerprises.com/uploads/1/3/0/5/130590126/kujokixupa_guluvaxelo.pdf
    • http://ayla-yoga.com/uploads/1/3/0/5/130551718/2642924.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_off00005bec.bin
d10a5bb0d6b50ee2d2052b2e1d402a77b7915b9d0098385daf2e2ca52da84631		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEC 8444 bytes

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