Malicious PDF — malware analysis report

Static analysis result for SHA-256 102aea003d4b1c9c…

MALICIOUS

PDF

42.9 KB Created: 2020-04-10 17:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7f3c63f96b5d0ddfb5046adf92e66229 SHA-1: 3670d97f52f1c5ba1aebac96a323be17d43e9da6 SHA-256: 102aea003d4b1c9ca640d9a0bea54f863292b10dbcbce0ea5341067611389b36
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body also contains a primary URL, http://acmespringwater.com/uploads/1/3/0/7/130775998/130775998.html#the+science+of+likability, and numerous other PDF links, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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://acmespringwater.com/uploads/1/3/0/7/130775998/130775998.html#the+science+of+likability
    • http://masventureholdingsllc.com/uploads/1/3/0/6/130639763/cdf5ce.pdf
    • http://strikingupsuccess.net/uploads/1/3/0/6/130621108/499ff3cafb86f0.pdf
    • http://kamalasnectar.net/uploads/1/3/0/2/130287284/2652200.pdf
    • http://cgclovecenter.org/uploads/1/3/0/7/130738676/xuguxozof.pdf
    • http://teachergreg.com/uploads/1/3/0/5/130551176/d9d9c1a475d833.pdf
    • http://pariscm.com/uploads/1/3/0/8/130814643/5229203.pdf
    • http://southbeachesgallery.com/uploads/1/3/0/2/130272603/5117574.pdf
    • http://jeep-wrangler-rubicon.com/uploads/1/3/1/4/131454683/6106996.pdf
    • http://melissasoldanoschoettle.com/uploads/1/3/0/6/130621656/zodinamagobufakize.pdf
    • http://hawaiivim.com/uploads/1/3/0/9/130969488/kever.pdf
    • http://gamesexpgroup.com/uploads/1/3/0/8/130813799/wanegapumatuxazor.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007662.bin
b07d3a3dcb65e0043387a5ede016fc3a504fada9f867973e2c33e27669254d1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7662 1784 bytes
font_01_sfnt_off00007ebc.bin
7594d636927d5aa2408e6fdef2034c0bd64ecb59b6d9e2594b34cb1fff6b6228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBC 8276 bytes

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