Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf7b73a3ff6bba2…

MALICIOUS

PDF

106.2 KB Created: 2021-03-20 03:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82e19496817da552f1c06bd9f3b273e5 SHA-1: e73bc8d1a390e9369fa3e3767c699675ef7ae3e3 SHA-256: 9cf7b73a3ff6bba2bcf08d4e1d2f2e2cdc4a09ec1af882f81af5d991c747cf23
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 'https://nipisod.ru/strik?utm_term=charles+spurgeon+sermons+on+prayer', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Charles Spurgeon sermons on prayer', likely a pretext to disguise the malicious intent. No scripts were extracted, but the presence of external URLs and the overall malicious verdict strongly suggest an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nipisod.ru/strik?utm_term=charles+spurgeon+sermons+on+prayer
    • http://jolidulikan.scienceontheweb.net/blender_3d_animation_tutorial.pdf
    • http://siankaanmexico.com/rujeve6zao8.pdf
    • https://cdn-cms.f-static.net/uploads/4390371/normal_604508124e1f3.pdf
    • http://lafilubepojev.scienceontheweb.net/what_is_the_whole_armour_of_god_kjv.pdf
    • https://static.s123-cdn-static.com/uploads/4421637/normal_5fddfa63eddea.pdf
    • http://kinoxca.xyz/new_headway_intermediate_fourth_edition_tests_answers548jr.pdf
    • http://fidofawi.medianewsonline.com/estudio_biblico_acerca_de_la_vida_de_jose.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/da506a3a-7d90-475a-bf88-57abbc947350/jose_emilio_pacheco_el_principio_del_placer_analisis.pdf
    • https://uploads.strikinglycdn.com/files/be7b1ebb-9c21-483a-9305-1398235291a2/mode_1_fracture_test.pdf
    • https://uploads.strikinglycdn.com/files/b2320fda-5506-42f8-b0e7-dd2f1c34e381/what_do_you_mean_by_the_term_alchemy.pdf
    • https://uploads.strikinglycdn.com/files/b1b6933c-e857-4ca9-9b18-acb16f8b4bdd/rhetorical_strategies_essay_for_ap_english_lang.pdf
    • https://uploads.strikinglycdn.com/files/0edbb31f-81f3-49c4-8d20-f9151cea25c6/pupovukukaxoluvemod.pdf
    • https://uploads.strikinglycdn.com/files/2e9cafb6-9e1c-43b7-9737-4f8fdcd9cd31/64650304020.pdf
    • https://uploads.strikinglycdn.com/files/44029d32-a745-41d4-aac0-602de8964833/car_air_conditioner_condenser_fan_not_working.pdf
    • https://uploads.strikinglycdn.com/files/24faada2-e793-46c5-8c9b-06ff3d1584c2/mewolaf.pdf
    • https://uploads.strikinglycdn.com/files/e36546f5-8609-4276-9689-0b16174fd834/subofonobananuzokefuwu.pdf
    • https://uploads.strikinglycdn.com/files/27bf8de8-f797-4894-b2f7-18bed057dae5/best_ar_15_m_lok_accessories.pdf
    • http://legokejapo.atwebpages.com/how_do_i_return_to_sender_australia_post.pdf
    • http://pedamodaw.onlinewebshop.net/how_to_use_great_circle_mapper.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_off000164ae.bin
960a29b1879a6440f5ec66e7ad8757cebc15962ee40b137bf089948083c16175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164AE 5240 bytes
font_01_sfnt_off00017659.bin
61a9b16fdc4d56ecaef2815fe1e495e9c7063e0aa3395c59f7a8c2d519a3bf7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17659 11016 bytes

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