Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4dd3af3eae6357…

MALICIOUS

PDF

76.9 KB Created: 2021-03-20 04:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9cee5047029208f03498e6468985d0a SHA-1: 525a75b99311281bc28d9f826812b6ed56107a09 SHA-256: da4dd3af3eae6357e755f0829694b4ecd1676db9b529fd80823d87784e924a8b
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, and multiple other unknown reputation URLs were extracted. The document body is heavily obfuscated, but the presence of these URLs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

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://leonvi.ru/strik?utm_term=most+peaceful+quotes+in+the+quran
    • http://idealicaitalia-official.site/drama_triangle_bookxc56m.pdf
    • http://instapriz24.online/61362439868216qn.pdf
    • https://cdn-cms.f-static.net/uploads/4483604/normal_605429f1a530b.pdf
    • http://naturfresh.space/fusion_360_ita_crackz384v.pdf
    • http://vawafaxas.iblogger.org/alter_ego_a1_online.pdf
    • http://phtech.site/tutaxemutitikugy960s.pdf
    • http://rastet-malysh.ru/pressure_conversions_worksheet_13-_1_answersmxre8.pdf
    • http://buloshnaya.site/sopa_de_letras_para_imprimir_para_adultoso4qbz.pdf
    • http://matteset-spon.space/9504536638627vl2.pdf
    • http://menbp.online/tp-link_default_wifi_password_after_resetawxor.pdf
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5fd63427bec47.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nisoxow/33543507266.pdf
    • https://uploads.strikinglycdn.com/files/561b6691-b7e0-4aef-b9c9-a450833c26de/47407222567.pdf
    • http://viganoxoloni.rf.gd/96708711315.pdf
    • https://uploads.strikinglycdn.com/files/99226c07-050e-45d8-8ad6-1378e60eb226/74082525340.pdf
    • https://uploads.strikinglycdn.com/files/3e67e00f-8680-49b8-939e-3c5c739c80b0/photoshop_photo_manipulation_tutorials_for_beginners.pdf
    • http://dubafelizam.epizy.com/31891035810.pdf
    • http://felepukagerek.epizy.com/online_spanish_classes_for_nurses.pdf
    • https://uploads.strikinglycdn.com/files/34f6ebd4-f07f-421e-97a9-dd89a1b07718/vumizojamumimedani.pdf
    • https://uploads.strikinglycdn.com/files/4e3a8e83-a224-4699-b761-f84bd0cb2045/18723417549.pdf
    • https://s3.amazonaws.com/bidurudilidujug/wu_tang_an_american_saga_episode_4_music.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_off0000ef52.bin
3b05a827e4b35488f3f52d545cb23724bc29dac65225e996d83579d15990b494
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF52 5232 bytes
font_01_sfnt_off00010128.bin
2d19878399c936538edcf685a3077988197b91d56321375e1f8d78611846bcd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10128 10524 bytes