Malicious PDF — malware analysis report

Static analysis result for SHA-256 5eb7074452a5d0e5…

MALICIOUS

PDF

37.7 KB Created: 2020-06-15 06:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: caf211258f296a13d3a0379320b5652c SHA-1: 5cc096658d7dfd716a049e2ae41b574fab46bdbf SHA-256: 5eb7074452a5d0e56ba21559a6c013f1d442190836a186ef8219be21c1852307
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection scheme. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update. This is a common social engineering tactic to facilitate credential theft or malware installation. The numerous external URLs are likely part of this lure.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://loveinkonline.com/uploads/1/3/0/9/130969336/130969336.html#editor+pdf+foxit+portable
    • http://phillipphanproperties.com/uploads/1/3/0/2/130270849/8133157.pdf
    • http://mail.smilinggrape.com/uploads/1/3/1/8/131856827/tetevogadu.pdf
    • http://eglisechretiennegracedivine.net/uploads/1/3/1/0/131071038/diremoji-lusomewaxoniko.pdf
    • http://antsearthmoving.designpreviewer.com/uploads/1/3/1/3/131379379/bukutedopise-lozema-salinojo-kixasexila.pdf
    • http://ljusvart.com/uploads/1/3/0/4/130494871/vamajepezelifat_wisovom.pdf
    • http://daretobetempted.com/uploads/1/3/0/5/130589156/vugifixa.pdf
    • http://cedarhillsdunlap.com/uploads/1/3/0/9/130969430/44bf47.pdf
    • http://playaauflorida.org/uploads/1/3/0/7/130739991/2b00ad.pdf
    • http://miespaciolimpio.com/uploads/1/3/1/3/131383921/wukedupawokixira.pdf
    • http://conversationswithheaven.com/uploads/1/3/1/3/131379262/96d3e5dadc.pdf
    • http://odinma.net/uploads/1/3/0/3/130323602/9243654.pdf
    • http://mailin.restauracemincovna.cz/uploads/1/3/0/6/130639273/8201005.pdf
    • http://opendors.com/uploads/1/3/1/8/131871585/7865102.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://wapisamuvubu.files.wordpress.com/2020/06/14047826273.pdf
    • https://gefadosujugi.files.wordpress.com/2020/06/vibezezut.pdf
    • https://lumexewo.files.wordpress.com/2020/06/3591448775.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_off0000661c.bin
670f245c599019afc05e8f4a112304ad07573d8ffb4a8332f4a3e3a9d8756b77
pdf-font-stream PDF embedded font (sfnt) at offset 0x661C 10892 bytes