Malicious PDF — malware analysis report

Static analysis result for SHA-256 67093dbf975afed4…

MALICIOUS

PDF

41.3 KB Created: 2020-04-21 09:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c56680d7e45ba3ee4ec7a010fb0fb158 SHA-1: 1ea5e8f4bc8183bdb471ec09f7f80c6159bed8bd SHA-256: 67093dbf975afed4de46acaacca60327f1a39525035391f96138dcd1ae250c80
96 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO link farms or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a potentially harmful external resource, likely for further exploitation or phishing.

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://urfacefix.com/uploads/1/3/1/4/131438011/131438011.html#lease+agreement+template+florida
    • http://fujiwarrior.com/uploads/1/3/0/5/130588461/988611.pdf
    • http://jennielearnsanatomy.com/uploads/1/3/0/6/130603673/lojof_kanaropamimut.pdf
    • http://boral-au.com/uploads/1/3/0/7/130738979/xiriwuludifari.pdf
    • http://kimcoretransportllc.com/uploads/1/3/0/6/130604824/tegepelokok.pdf
    • http://mozziemotorsports.com/uploads/1/3/0/4/130478648/pewuninumuze.pdf
    • http://tropigalprovisioning.com/uploads/1/3/0/8/130874431/07e2bf705.pdf
    • http://floortilenearyou.com/uploads/1/3/0/3/130324011/vonupezekam.pdf
    • http://conqueror.shop/uploads/1/3/0/8/130873939/nukapuxegivov.pdf
    • http://moreyhomeinspections.com/uploads/1/3/1/1/131163617/fewazegozopawejije.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006395.bin
96bea7746ab1e486e9588a8bef8f3c73cd725e82470b8b7e49f246c94c78b097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6395 7972 bytes
font_01_sfnt_off0000827c.bin
b3affdfdfee497c2d3230853582529cf395d265bfdbb8cde7d84ae9c33602211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827C 16036 bytes

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