Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec48f2086da79e2…

MALICIOUS

PDF

148.3 KB Created: 2021-03-30 05:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0b3bd9bb4f6fea2c8e05584e9318492 SHA-1: 5386f17f3181ecc481ae040cac062dc2bfd2d982 SHA-256: 6ec48f2086da79e29f513e277fe107054b9dbbe3a2b72cdba25adc49a7598359
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a heuristic firing for a browser extension/update installation lure, indicating a social engineering attempt to install malicious software. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL points to a domain that is likely part of the attack infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://zajinet.ru/wix?keyword=ingenuity+washable+playard+assembly
    • http://likelid.xyz/developing_the_leader_within_you_summaryhfunm.pdf
    • http://hardcreditcheck.info/summary_of_the_story_the_masque_of_the_red_deathxu2k7.pdf
    • http://copyrightsupporteds.com/what_is_the_best_black_and_decker_workmatesz6j8.pdf
    • https://cdn-cms.f-static.net/uploads/4530457/normal_602c75aeb6d04.pdf
    • http://setakini.22web.org/keripipexug.pdf
    • http://mainsale.info/fifty_shades_freed_movie_in_hindi_download_filmywapcfdf4.pdf
    • http://tenegijo.iblogger.org/tokofegajugad.pdf
    • http://chambrehq.xyz/gevexezotejuripuxot9jqdk.pdf
    • http://rentline.pro/the_other_wise_man_henry_van_dyke_textz2km0.pdf
    • http://fb-copyright-help-from.com/telalurufeweju8vpy1.pdf
    • http://rofepanix.iblogger.org/murumo.pdf
    • https://cdn-cms.f-static.net/uploads/4414680/normal_60445e594ae17.pdf
    • http://toolsbestpricemicrometer.site/whats_dress_down_day0ppx0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/07e74035-fafd-4540-8ea4-a2fbb0cb272e/11628534764.pdf
    • https://uploads.strikinglycdn.com/files/58b4bdb8-81ce-4e28-8d69-5627f5ffd187/rikuxufivonokojawunozoz.pdf
    • https://uploads.strikinglycdn.com/files/4bf7b74f-f491-4f94-b858-63a95ff9e258/85268658584.pdf
    • http://giraxajo.epizy.com/wheel_of_time_show_amazon.pdf
    • https://uploads.strikinglycdn.com/files/7c2e41a7-696e-4853-88a4-0896a48c23ca/singing_lessons_for_little_singers.pdf
    • https://uploads.strikinglycdn.com/files/7d1aceca-9adb-43eb-90fe-8ec267aa137f/fleabag_play_script_free.pdf
    • http://fulawumobolofog.epizy.com/jisosibafivenok.pdf
    • https://uploads.strikinglycdn.com/files/32ca61db-69f6-49d2-bd3b-96feb9c2851d/39015948120.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f337.bin
50b3af12f7f32630506e5d77f63592a153df6a292edab7dc9062808e0a506835		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 84268 bytes
font_01_sfnt_off0001efc5.bin
91226ef7493c3446421c72197ac83fd6773d0c49cfa8bd5abf6f4d2f9dd9b1da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFC5 5644 bytes
font_02_sfnt_off000202dd.bin
92c97c16e41c70b31f8d1760c9c575b9ffbce7329c29791930a4f97e2e5c8e0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x202DD 11964 bytes
font_03_sfnt_off00022af7.bin
25a5e6c7c9cd73e1730f271d334b71b3c0ac6385951e3737251623a68d8eef5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22AF7 16160 bytes

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