Malicious PDF — malware analysis report

Static analysis result for SHA-256 7166e91bb7ac43ee…

MALICIOUS

PDF

39.5 KB Created: 2020-06-06 02:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 986029b2c10f2c22d5c4c65b7efd5839 SHA-1: eb5ed5839de038893954349dbad74bba14f7ea60 SHA-256: 7166e91bb7ac43ee95bb02d3229936be2aa550de8e3fd887a46e15031783107e
104 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, a heuristic indicating a link farm, and a specific lure related to video playback errors. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the overall structure suggest an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://itsjusttroy.com/uploads/1/3/0/8/130815115/130815115.html#megabox+hd+can%2527+t+play+video
    • http://dgrealtygroup.org/uploads/1/3/0/6/130604806/runijesun-difomapelawugo-roxaxarimij-dofabevevud.pdf
    • http://noeticpractices.com/uploads/1/3/0/6/130604739/vekute.pdf
    • http://webmail.hamilkerrchallenge.com/uploads/1/3/0/7/130739090/5039170.pdf
    • http://cetonantzin.org/uploads/1/3/0/9/130969426/doseg.pdf
    • http://terriholifield.com/uploads/1/3/0/5/130588548/gidinalomu.pdf
    • http://mta-sts.mx.jillskupinburkholder.com/uploads/1/3/1/4/131437421/814652.pdf
    • http://iqautoservicesltd.com/uploads/1/3/0/4/130436163/libenopadevi_fefikun.pdf
    • http://itsjusttroy.com/uploads/1/3/0/8/130815115/terms.html
    • http://itsjusttroy.com/uploads/1/3/0/8/130815115/dmca.html
    • http://itsjusttroy.com/uploads/1/3/0/8/130815115/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mizarexil.files.wordpress.com/2020/06/difeme.pdf
    • https://sotuvevom.files.wordpress.com/2020/06/34110047779.pdf
    • https://vuzemod.files.wordpress.com/2020/06/ximutakekulaxipofigo.pdf
    • https://mufawakesone.files.wordpress.com/2020/06/17037130467.pdf
    • https://kajoginali.files.wordpress.com/2020/06/7828546858.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d83.bin
6ce23d51b7961ad645099693bebeab57f07b6d3929243eea6aa82dedead7fd89
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D83 11328 bytes