Malicious PDF — malware analysis report

Static analysis result for SHA-256 176aff1868ec6dbb…

MALICIOUS

PDF

138.0 KB Created: 2020-06-14 23:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b31ce1c457c23eb7f8e4d52f8ae5bfd SHA-1: ac55b0700fecbf4c341ac79ab716937cc224d149 SHA-256: 176aff1868ec6dbb87e963604b5764ec215c94014632dcfd90ee944dace72735
96 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body, though heavily obfuscated, contains a URL that appears to be part of a restaurant guide lure. The presence of multiple PDF link farm heuristics indicates a high likelihood of malicious intent, possibly to distribute further payloads or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://diasporawearuk.co.uk/uploads/1/3/1/8/131859261/131859261.html#downtown+tampa+restaurant+guide
    • http://rcbadvisors.net/uploads/1/3/0/7/130740113/4c3d1a77438df.pdf
    • http://hurondd.com/uploads/1/3/0/8/130814923/napim-jesiniwaje.pdf
    • http://mail.oscartrenam.com/uploads/1/3/0/5/130589279/9a896eebfd9.pdf
    • http://cmanmedia.com/uploads/1/3/0/8/130873902/xobubogelu_sifujejipuruxa_mitajuni_tajedi.pdf
    • http://mail.itsnotaboutmoney.com/uploads/1/3/0/2/130288520/fosebenorotupizuni.pdf
    • http://pulleyautoparts.co/uploads/1/3/0/6/130620888/b01e8.pdf
    • http://jocilynsjourneytowellness.com/uploads/1/3/0/7/130739423/litamax.pdf
    • http://aipriceaction.org/uploads/1/3/1/6/131606789/47e42b3c41e.pdf
    • http://bahamasaugustllc.com/uploads/1/3/1/4/131410939/9773237.pdf
    • http://kinggroundworksplanthire.com/uploads/1/3/0/4/130476650/xanerivem-perenumeviv-rititanugudepi-lobuxiwevuke.pdf
    • http://ordrealestate.com/uploads/1/3/0/5/130542977/fb095b8dded1cec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://vimolor.files.wordpress.com/2020/06/25567252723.pdf
    • https://bamaxev.files.wordpress.com/2020/06/mofokazegumomaf.pdf
    • https://jozenomo.files.wordpress.com/2020/06/70489858932.pdf
    • https://nozikop.files.wordpress.com/2020/06/60113999254.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_off0001f4eb.bin
cb222d404b54c5fd97cc60278ff6e4a780fda55b4f49e0a3ea3098bef714a49c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4EB 11552 bytes

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