Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee5c04512707edb…

MALICIOUS

PDF

74.6 KB Created: 2020-03-29 10:15:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e7ad236162ed2c1b1da673a923566be0 SHA-1: 43fc1c688e07eda710ceb3e40f101d945401089a SHA-256: aee5c04512707edb8ceb3481bc7429ce51fc5282d6e69ec0e2412b6f64ec664d
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, a technique commonly used in SEO link farms to manipulate search engine rankings or to distribute malicious content. The ML classifier strongly indicates maliciousness. The embedded URLs point to various domains, suggesting a broad distribution effort. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://zambiasafarihunting.com/uploads/1/3/1/4/131437619/131437619.html#shmoop+cyrano+de+bergerac
    • http://singlebarrelevent.com/uploads/1/3/0/6/130639836/wukixerimawavoduf.pdf
    • http://inspiretorespirefoundation.com/uploads/1/3/0/6/130620340/dejigizin.pdf
    • http://www.shopdebbie.net/uploads/1/3/0/3/130313252/savowixu.pdf
    • http://oldtownpublic.com/uploads/1/3/0/2/130287502/rakejekisa.pdf
    • http://mattbel.com/uploads/1/3/0/4/130488993/ripet.pdf
    • http://southmountainarms.com/uploads/1/3/0/6/130640172/44996980008.pdf
    • http://hotgirlsofamerica.com/uploads/1/3/0/3/130313378/e0d50d67224e656.pdf
    • http://ebbtidewellnessstudio.com/uploads/1/3/0/6/130604888/fulezox.pdf
    • http://simplytc4me.com/uploads/1/3/0/6/130621313/filozararavas.pdf
    • http://caminoventure.com/uploads/1/3/0/6/130639246/radevajejekekopan.pdf
    • http://russian-class.com/uploads/1/3/1/1/131163986/losifu_rapefilawipi.pdf
    • http://rapchikmal.com/uploads/1/3/0/5/130550744/lugolamo.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_off0000fe6b.bin
970b4f13aae44724a7642d88f1060a5d29c2909866e1a07aeecccf9eb6e40c93		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 8172 bytes

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