Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc51dbd69ddb9873…

MALICIOUS

PDF

89.1 KB Created: 2021-05-06 04:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f217108154b73ce19123698e5b208b2 SHA-1: 15ed7191c17d6f2f6e962ac3d4f96bdc5a886466 SHA-256: bc51dbd69ddb987337b10f8aebe05c218a71ecf877475bef62ec0ebd077e032c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The document body, though heavily obfuscated, contains text related to a product review, suggesting a lure to disguise the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xezojetit.ru/strik?utm_term=bushnell+neo+ion+gps+watch+review
    • http://nikecortez.net/8329841134p06d0.pdf
    • http://bogplaktnc.fun/the_outbreak_movie_summary4dmty.pdf
    • http://spain50off.info/392968634103upx.pdf
    • http://italysummer.fun/32959844981wp4yq.pdf
    • https://cdn.sqhk.co/ditetijesi/dBrhbhf/babetadanafolazin.pdf
    • https://cdn.sqhk.co/zanotunuzi/hWpKfNi/fuxezusamilorolanenowafo.pdf
    • http://pochta-24.cc/airthings_wave_review46f18.pdf
    • https://cdn.sqhk.co/fegibidizog/dq9XbQs/totally_accurate_battle_simulator_download_landfall.pdf
    • http://lorewipa.scienceontheweb.net/azure_devops_tutorial_for_beginners.pdf
    • https://cdn.sqhk.co/tagisaxozof/gfgjJhi/simple_baking_recipes_for_beginners.pdf
    • http://prizinsta24.space/64523190408xtdig.pdf
    • http://pipvip.ru/how_to_set_up_a_harmony_one_remoteo12oz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_fc2e8cc6fc4248828e1b763dbc555f5d.pdf?index=true
    • https://s3.amazonaws.com/zuvovoxigumuz/what_is_a_social_studies_elective.pdf
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_10d29adc00544c1aa24911b48527c3f3.pdf?index=true
    • http://zaduzos.myartsonline.com/definition_of_business_research.pdf
    • https://s3.amazonaws.com/bisute/38989962954.pdf
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_7394447e82a84491b59f5a803234fff9.pdf?index=true
    • https://s3.amazonaws.com/kitakilesa/red_letters_dc_talk_piano_sheet_music.pdf
    • https://s3.amazonaws.com/lomogas/rerov.pdf
    • https://e5447efa-8854-4d04-834e-f0bbd7438c8b.filesusr.com/ugd/ac612b_fd168a8058ad4037b93bd3b6a81a37d8.pdf?index=true
    • https://959e49da-b405-4961-97d4-5c1bb2e9a628.filesusr.com/ugd/ab0441_14eb9de5adca4a7eb5d12227e878e46d.pdf?index=true
    • https://s3.amazonaws.com/wujafivabipo/76856224423.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f5e.bin
cb2c8fed148c32e252ef5d62af87353b6f37cf938c801cf8be8cc14ba1760c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5E 5276 bytes
font_01_sfnt_off0001215d.bin
8653fd3094fed891f1008061d521fb7c903351f533db8c714973ec557376cda5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1215D 11596 bytes
font_02_sfnt_off000148ec.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148EC 4324 bytes

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