Malicious PDF — malware analysis report

Static analysis result for SHA-256 49aeae9dea1c4d5f…

MALICIOUS

PDF

41.6 KB Created: 2020-04-15 06:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e4c7644780212483217e1612900cc49d SHA-1: 88d238c2f3178e20463e85cd5b980d6b09e6d0ae SHA-256: 49aeae9dea1c4d5f6a0467cbe5ae70edfbb49e1eb848c9fa9ec375061ebd5306
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The embedded URLs are the primary indicators of compromise, suggesting a campaign to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://capturedthat.com/uploads/1/3/0/6/130620666/130620666.html#knights+chronicle+awakening+guide
    • http://homesteadstoragellc.com/uploads/1/3/0/7/130738722/xovetixaxikopuv.pdf
    • http://theplanteco.com/uploads/1/3/1/4/131454581/nesafu_zibotorapivid_todezazoz.pdf
    • http://reelbrothersbassn.com/uploads/1/3/0/2/130288361/8ef400b.pdf
    • http://alllifefree.com/uploads/1/3/0/5/130551323/mekevidixe-wolafe-biwekige.pdf
    • http://stitchedkouture.com/uploads/1/3/1/6/131637606/tefude.pdf
    • http://simpledelisheats.com/uploads/1/3/1/1/131163505/427f65331cf3.pdf
    • http://uciesl.com/uploads/1/3/0/5/130546971/7808673.pdf
    • http://sexeparadisco.com/uploads/1/3/1/4/131407011/givirusewodadezizus.pdf
    • http://simpledelis
    • 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_off00007938.bin
c1774c8812a6d41d76f7cb3d7f7e12849d5ddf4ab951639841440c9cca9bd9c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 8824 bytes

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