Malicious PDF — malware analysis report

Static analysis result for SHA-256 8822a5ce755cb63b…

MALICIOUS

PDF

50.8 KB Created: 2020-06-05 20:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28d9355be007181a0f44ef7db9dab2a6 SHA-1: 39840d6567565a7ec8d534fb19ebf21f5b75159d SHA-256: 8822a5ce755cb63bdd9c11339579c220dabcec49b9fbcc040bd24f1b22d8e578
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous external links, many pointing to domains that appear to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a campaign to manipulate search engine results or drive traffic. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document may also be intended to trick users into believing they need a password for an archive, a common tactic for hiding malicious payloads. No scripts were extracted from this sample.

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://seriouslysassy.net/uploads/1/3/1/0/131070711/131070711.html#mastering+the+art+of+getting+things+done
    • http://bolofide.com/uploads/1/3/1/8/131856771/048c1.pdf
    • http://tributegraphics.com/uploads/1/3/1/8/131857090/cc710c0f1a.pdf
    • http://fr.melissa-melendez.com/uploads/1/3/1/8/131860938/1487719.pdf
    • http://magnoliainteriors.org/uploads/1/3/0/3/130323249/f5b9c0cd.pdf
    • http://treesforourfuture.com/uploads/1/3/0/7/130739489/taruzajaraxodi.pdf
    • http://howtheheckwouldiknowthat.com/uploads/1/3/1/4/131411281/6588624.pdf
    • http://ylc3.gobeyondthepond.com/uploads/1/3/0/5/130544387/6983fce3d.pdf
    • http://soultivity.net/uploads/1/3/2/3/132302960/nitiberuguzomoduko.pdf
    • http://seriouslysassy.net/uploads/1/3/1/0/131070711/terms.html
    • http://seriouslysassy.net/uploads/1/3/1/0/131070711/dmca.html
    • http://seriouslysassy.net/uploads/1/3/1/0/131070711/policy.html
    • https://revaxakel.files.wordpress.com/2020/06/73275841762.pdf
    • https://wimaped597797669.files.wordpress.com/2020/06/67404643122.pdf
    • https://fugokogan.files.wordpress.com/2020/06/20693149725.pdf
    • https://miserowage857454741.files.wordpress.com/2020/06/63095964108.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_off00009b36.bin
47834e0a6b87495b5d15985a0c2e6987913c46b9457b3093a1f1e94e34a4cada		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B36 10576 bytes

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