Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe39dbbfed52fa3c…

MALICIOUS

PDF

78.6 KB Created: 2021-03-18 01:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceec8a91b8889fb701b1b6798e1ba58d SHA-1: 1dd05b10714b0a452977432afaab8a5951acd62e SHA-256: fe39dbbfed52fa3cfe519baa6f5c981301f30f0ba5f4254da09cc9200be4c8a9
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL pointing to 'golowaki.ru', which is likely part of a phishing or redirection scheme. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to direct the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wix?keyword=stargate+rpg+release+date
    • https://cdn.sqhk.co/babonisu/9KjcghI/cms_abn_form_instructions.pdf
    • http://health-top.ru/bedopoxekokifexopimawrwa9.pdf
    • https://cdn.sqhk.co/wekaradukuve/DYhf8up/catfish_cooley_wife_snapchat.pdf
    • http://fishland.store/free_online_dnd_map_makeriufcw.pdf
    • http://jobs-ingenieur.best/how_to_learn_forex_trading_fastery9jci.pdf
    • https://cdn.sqhk.co/guvawatuzax/dWLIffU/lg_led_remote_app_download.pdf
    • http://online-bestshop.xyz/90142591183j3bwj.pdf
    • https://cdn.sqhk.co/nonagidux/ujbiiPR/lenovo_shareit_for_pc_download_latest_version.pdf
    • http://nicechange.space/ruvefasonamununixikubonitiqsli.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/94c12ea7-c0c7-46a7-9cfb-68f08a87f0cf/series_of_unfortunate_events_book_1_reading_level.pdf
    • https://uploads.strikinglycdn.com/files/e912871f-44f1-48d6-accd-5d0128c2c9a2/how_to_read_a_lowrance_hook_5_fishfinder.pdf
    • https://s3.amazonaws.com/wukevirenesu/kixowomobesopubowumi.pdf
    • https://uploads.strikinglycdn.com/files/d8981f2d-8695-4204-ad79-366096504eb7/xupeg.pdf
    • https://s3.amazonaws.com/xokebore/pakistan_studies_notes_in_urdu_class_10.pdf
    • https://uploads.strikinglycdn.com/files/6bcde2e2-6d48-416e-b855-86263dd124fd/maravilloso_desastre_saga_cuantos_libros_son.pdf
    • https://uploads.strikinglycdn.com/files/eadff454-d9ae-460a-9888-03fe7c6f0e9f/fft_spectrum_analysis_matlab.pdf
    • https://s3.amazonaws.com/lekelepowo/iomega_storcenter_ix2_quick_start_guide.pdf
    • https://uploads.strikinglycdn.com/files/46a109f1-e20b-4d23-bdf5-fdabc15a5a5f/nelepigevigevogefotu.pdf
    • https://uploads.strikinglycdn.com/files/a1e216a2-0ad0-4240-a129-05cae8436162/define_doctrine_of_discovery.pdf
    • https://s3.amazonaws.com/jedobufudajewu/cadbury_sixth_form_college_term_dates.pdf
    • https://s3.amazonaws.com/wukevirenesu/mojaxaf.pdf
    • https://uploads.strikinglycdn.com/files/ba110a97-84a5-4565-a40d-1bfe12523beb/56594626451.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_off0000f2f2.bin
0f272033f8aa783e83c44dc0be39c5ed119871037fae964c55ca16f62a94cb1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 5228 bytes
font_01_sfnt_off000104c3.bin
688f6b854d123dc488ab5da9cf61b8a26e9b683bb12f44fea25bf5111b4e17c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104C3 11888 bytes

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