Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41de9eb70f1d746…

MALICIOUS

PDF

78.8 KB Created: 2021-03-21 07:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66e8c00669c4a4f7896728f8e8f28e5f SHA-1: 2d46ce57f33cf0d55375b2965bade1374451c71c SHA-256: b41de9eb70f1d7468ea1e37e463ed514ad08c3300a56450f66d86c812496b741
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains text related to a 'voter guide', suggesting a lure. The embedded URL points to a suspicious domain, likely serving as a phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/wix?keyword=willamette+week+voter+guide+2019
    • https://cdn.sqhk.co/susopavazane/K3haCig/arena_of_valor_5v5_arena_game_hack.pdf
    • https://cdn.sqhk.co/kokojisip/jbge7jc/tractor_pulling_games_for_xbox_360.pdf
    • https://cdn.sqhk.co/letijefa/ajejiE4/bowling_western_suburbs_melbourne_rentals.pdf
    • http://tonojodozif.mypressonline.com/54164781395.pdf
    • https://cdn.sqhk.co/votijavos/8yjdaid/download_f1_mobile_racing_mod_apk_android_1.pdf
    • https://cdn.sqhk.co/puwukuwos/e6ibYje/98501644777.pdf
    • https://cdn-cms.f-static.net/uploads/4419192/normal_604ce0e50177d.pdf
    • https://cdn.sqhk.co/luwesefizi/s5iiaD6/nda_exam_paper_2018_download.pdf
    • https://cdn-cms.f-static.net/uploads/4416939/normal_5fe6c66a0caeb.pdf
    • https://cdn.sqhk.co/parikozug/hetge4U/the_big_dipper_crossword_clue_6_letters.pdf
    • https://cdn-cms.f-static.net/uploads/4488336/normal_601b2189230a0.pdf
    • http://dusikazo.mypressonline.com/american_academy_of_ophthalmology_books_free_download.pdf
    • http://vikiduxa.mywebcommunity.org/31625266769.pdf
    • https://cdn.sqhk.co/zifeduwa/hG3wrHP/36299878707.pdf
    • http://bomisedoxu.mywebcommunity.org/40216076593.pdf
    • https://cdn.sqhk.co/gavezexu/4eiibCa/61031142112.pdf
    • https://cdn-cms.f-static.net/uploads/4452373/normal_603f60a658e5a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jetotajasavesi.atwebpages.com/5958454501.pdf
    • https://uploads.strikinglycdn.com/files/c97c15d6-1167-4959-8ca4-d2df81b0b16c/zikedigudud.pdf
    • https://uploads.strikinglycdn.com/files/374b51d5-64c8-4541-9122-1e6dbd916aad/epson_powerlite_1761w_multimedia_projector.pdf
    • https://uploads.strikinglycdn.com/files/de4273a2-6019-4909-b186-cafa2fb153ee/kindergarten_math_books_free_download.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f684.bin
fa62d8631ff2d51736281fa64cc1e4facf5191c852cb0ecde4f98e884ee0be35
pdf-font-stream PDF embedded font (sfnt) at offset 0xF684 5676 bytes
font_01_sfnt_off000109ea.bin
41863ba2505263e73ba9ac4decf6cd7b3a22cbf5ffbceed2e6129162a55ded98
pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 10552 bytes