Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6c5c87c2e8d4222…

MALICIOUS

PDF

48.2 KB Created: 2020-04-10 05:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e2d221aa84da9a20fcee6ab86c5e655b SHA-1: 36026b473f282ddf410c417d14178846e02bcf89 SHA-256: e6c5c87c2e8d4222b4d8edc85a05806119653867be10479af83a4cf2ab15e9d5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though partially corrupted, contains text related to 'free fire' and a 'butcher mask', suggesting a lure to engage users with popular online game content. The primary malicious activity observed is the redirection to a network of unrelated websites, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://swissmedconsult.net/uploads/1/3/0/5/130589391/130589391.html#como+se+consigue+la+m%C3%A1scara+de+carnicero+en+free+fire
    • http://paigethai.com/uploads/1/3/1/0/131070152/6655811.pdf
    • http://kyidealroofing.com/uploads/1/3/1/4/131408061/e9a6eac155d8.pdf
    • http://restoredyogatherapy.com/uploads/1/3/1/1/131164455/daxoxurituza_lurup_lefovow_jilatose.pdf
    • http://carlosnarrovigo.org/uploads/1/3/0/7/130739894/wuperes_fovan_pupik_gukos.pdf
    • http://reallyartsltd.com/uploads/1/3/0/5/130550777/5d1e5.pdf
    • http://physiophysis.net/uploads/1/3/0/8/130814863/8d7578d58c8cae7.pdf
    • http://cyndibeetravel.com/uploads/1/3/0/2/130272850/502896.pdf
    • http://depilatsioonmeestele.ee/uploads/1/3/0/7/130740450/8947433.pdf
    • http://motherofmane.com/uploads/1/3/0/4/130489132/baxiw.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006127.bin
5011f6928f24312892e3838dd18bbe72b334d9a9c287bfaf24ea2bf48ca3a3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6127 9500 bytes
font_01_sfnt_off000083c2.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C2 2668 bytes
font_02_sfnt_off00008d27.bin
ebd18db63d5da2d4bcc282c225a428326c144334ce2034a09480eba483509f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D27 2336 bytes
font_03_sfnt_off000097c7.bin
53024bcccd015ffe55c017520d8355273f89aeec2864ee87de595bd32628a658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97C7 16756 bytes

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