Malicious PDF — malware analysis report

Static analysis result for SHA-256 5563cf7e7e0c2705…

MALICIOUS

PDF

44.3 KB Created: 2020-04-09 00:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c70566b337df8ba8d04a710fe4dfbb48 SHA-1: 2046ee59d6ec2ffdb767c3f5b16242d733c8ccc5 SHA-256: 5563cf7e7e0c270509d045ee3bca4201959bd228af0153490f3e58fd5132c6af
94 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm designed to manipulate search engine results or redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF. The embedded URLs suggest a redirection or download mechanism is in play.

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://myeutv.online/uploads/1/3/1/1/131164129/131164129.html#sexcraft+mod+minecraft+1.+7+10
    • http://adrianascamardi.com/uploads/1/3/0/2/130289589/soxixiro.pdf
    • http://premiereathleticrecruiting.net/uploads/1/3/0/7/130776075/606357.pdf
    • http://natashanatraj.com/uploads/1/3/0/7/130740187/8044ca27173de.pdf
    • http://epharmaerp.com/uploads/1/3/0/4/130483109/juzexut-davuk-muzopanot-jajuruvefelasu.pdf
    • http://dcnotaryopennow.com/uploads/1/3/0/8/130814984/c0ab87f.pdf
    • http://wghs64.org/uploads/1/3/1/4/131453016/afbd159a5.pdf
    • http://sarahdwire.info/uploads/1/3/0/7/130739221/wokeriw.pdf
    • http://britishgothictarot.us/uploads/1/3/0/7/130775791/f9eaa8eb.pdf
    • http://mail.cadillacautorepair.com/uploads/1/3/1/4/131411088/baaa17979f6.pdf
    • http://projecthomestead.us/uploads/1/3/0/2/130289809/jefafalefadif.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000664c.bin
37892fef88a678180245f7da44d66a61f41f5acabe96886a358da0ea8f199409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664C 8056 bytes
font_01_sfnt_off00008566.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8566 2652 bytes
font_02_sfnt_off00008ecf.bin
81df44247aa6368ee4f5613fd77267ee6cd66bd9e993d06b683ce941502b9c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 16064 bytes

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