Malicious PDF — malware analysis report

Static analysis result for SHA-256 90f3a139d999ab18…

MALICIOUS

PDF

99.7 KB Created: 2021-03-18 19:58:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d035170cd7e8ef9683ce31946e91c3c SHA-1: 5edba42005975d667cf4b24cb05d8129fc4c7869 SHA-256: 90f3a139d999ab18c809bd10af048a6fa0c82df5cf60e861cd1d1000e2dc07a0
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'jacksth.ru', which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though partially corrupted, suggests a lure related to an installation manual, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=garmin+echomap+plus+94sv+installation+manual
    • http://gemajesubon.22web.org/does_taco_bell_still_have_the_breakfast_crunchwrap.pdf
    • https://cdn-cms.f-static.net/uploads/4369769/normal_60438acbde1e4.pdf
    • http://ruvujagefeko.mygamesonline.org/grimorium_verum_the_true_grimoire.pdf
    • https://cdn.sqhk.co/zewezerezi/ehcgdgi/glow_grid_game.pdf
    • https://cdn.sqhk.co/pibilebomek/kjaAJx7/sofebez.pdf
    • http://doropunakas.iblogger.org/adobe_shop_apk.pdf
    • https://cdn.sqhk.co/kuzabajixiw/jdgjsid/police_plane_super_wings.pdf
    • https://cdn-cms.f-static.net/uploads/4405430/normal_601467dd30d07.pdf
    • https://static.s123-cdn-static.com/uploads/4481052/normal_5fc77ab067422.pdf
    • https://static.s123-cdn-static.com/uploads/4465719/normal_60069b482c6ae.pdf
    • http://viwaginuf.iblogger.org/noderategimovimeso.pdf
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5ff910da259f6.pdf
    • http://bekopomulasebi.getenjoyment.net/usmle_step_1_passing_score_2019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_bcc5056e032e4290a108e7457f4a91d7.pdf?index=true
    • http://futikuzita.onlinewebshop.net/209323026.pdf
    • http://jazomavok.epizy.com/mr_baldi_game.pdf
    • http://domuromu.atwebpages.com/romeo_and_juliet_act_1_scene_5_discussion_questions.pdf
    • http://limirosu.rf.gd/solving_equations_with_variables_on_both_sides_kuta.pdf
    • https://uploads.strikinglycdn.com/files/ce0161f5-dcbc-4f92-8865-7732826036ce/beholder_indy_yelp.pdf
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_f5ff2e1193ab49628b6dc2afc86cefd4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/693044c3-35d1-4b26-ad5f-e3caa2146472/used_icom_718_for_sale.pdf
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_8a0d3cf22451437abe589ba275725263.pdf?index=true
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_76bb729d5ffb4d0fbd60ee75dcdb264a.pdf?index=true
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_242f4f34e1af4d1d82759f24a887885d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/9b18ceb9-906f-4625-8a64-c91603db2747/computer_programming_for_beginners_a_step-by-step_guide.pdf
    • http://sasukagisodubex.onlinewebshop.net/32607442238.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_off0001448b.bin
f2fb4e96f1e2eb61571e28f294ea0329688db4073a608e2bffe356f3979b0649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1448B 5508 bytes
font_01_sfnt_off00015727.bin
00badb7850fd187726a1ede978ebb2592542b34bdb44db1e1bfdc0960d5614de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15727 11960 bytes

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