Malicious PDF — malware analysis report

Static analysis result for SHA-256 028c547b361b9cfc…

MALICIOUS

PDF

39.8 KB Created: 2020-04-11 03:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 32710287228ce2e9bd72ed9486c02a28 SHA-1: 4eab70e99388c9054921a5f9fa0d5304cdf8ba44 SHA-256: 028c547b361b9cfcef0eb5acbe6df2aa9a85cf69a4ad765c6d49b454fe8e9b73
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains a title related to 'Alice in Wonderland' and references the wkhtmltopdf tool, suggesting it was generated programmatically. The primary attack pattern involves leveraging these numerous links, likely to manipulate search engine results or redirect users to malicious sites. No scripts were extracted, but the presence of many external URLs indicates a potential for further malicious activity.

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://host37.carmichaelnl.com/uploads/1/3/1/4/131438432/131438432.html#alice+no+pais+das+maravilhas+frases
    • http://mobilegroomersarasota.com/uploads/1/3/0/7/130739553/5343618.pdf
    • http://cleanpaintbooth.com/uploads/1/3/0/6/130639267/b1ce12af0eb.pdf
    • http://naylzbeauti.com/uploads/1/3/0/5/130543546/lizokuti.pdf
    • http://agbumdsalumni.org/uploads/1/3/1/3/131383363/jajin_xupaw_birugasozinev.pdf
    • http://thetransformacademy.org/uploads/1/3/0/5/130588821/1422755.pdf
    • http://cornerstonepi.ca/uploads/1/3/0/2/130291589/f32495706fc.pdf
    • http://runforthehigh.com/uploads/1/3/1/4/131453990/zixejinuxatisof.pdf
    • http://grandviewlodgeandresort.com/uploads/1/3/0/8/130813840/suluzoga_xuzetanu_nojeturape_gogagux.pdf
    • http://middleclassempowermentzone.org/uploads/1/3/1/3/131398052/gexepozizu.pdf
    • http://counterboycott.org/uploads/1/3/0/6/130639092/7497768.pdf
    • http://carolinabenefitsagency.com/uploads/1/3/0/7/130738824/pukejeluniwexabiwo.pdf
    • http://lilidinunzio.com/uploads/1/3/0/8/130813372/masabatutopid_kofukolem_gixubalepij.pdf
    • http://williamsoncountylanduse.com/uploads/1/3/0/8/130814310/taxaxapovid.pdf
    • http://nextlevelnl.org/uploads/1/3/0/7/130738841/e3cb830487fe8.pdf
    • http://dedicatedladiesconcrete.com/uploads/1/3/0/5/130551805/basajawewa.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_off00007090.bin
57046817d80d931a0e7806d4ae4f55c2113b97347551663f6f576002184796e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7090 10116 bytes

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