Malicious PDF — malware analysis report

Static analysis result for SHA-256 4358f4d36048c85f…

MALICIOUS

PDF

86.4 KB Created: 2021-04-06 16:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: db5683f7fb456e8f0ea26d00509a6ccb SHA-1: 8fdcfa8664cb7cf632a364e8a605821d8e8a35cf SHA-256: 4358f4d36048c85f58d3ef627180a805541bb0066222f0771c20d8f958bbe1df
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to search results or downloads, aligning with a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/wix?keyword=bogano+chests+abandoned+workshop
    • http://togaxifobuf.mypressonline.com/babcock_university_post_utme_past_questions.pdf
    • http://reduslimitalia-oficial.site/95728839193jkje3.pdf
    • http://xtw2.club/7257211302487mjj.pdf
    • http://retys.space/download_game_crowd_clash_moduck9p.pdf
    • http://zegobudipaju.mywebcommunity.org/93206681153.pdf
    • http://laulu-go.ru/curso_de_html5_y_css_free_downlondloe.pdf
    • http://fb-ig-copyright.com/how_to_sample_with_a_random_number_tablebvgtd.pdf
    • http://copyrightreports.com/pewibetowufenurujb2r8.pdf
    • http://xsafak.com/muratovemujegiratewebam0r07a.pdf
    • http://souve.me/fiputudilofetone4mueo.pdf
    • http://zisuroto.mygamesonline.org/84275094997.pdf
    • http://startask.ru/15003088696mvs3o.pdf
    • http://fesotisifofil.mygamesonline.org/jemigapogikafikowujon.pdf
    • http://dostafood.xyz/program_schlage_deadbolt_lockfsds8.pdf
    • http://help-copyrightservice.xyz/richard_iii_act_3_scene_4_summaryvlh2y.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pegozegi/analyse_this_movie.pdf
    • https://s3.amazonaws.com/lofese/kununa.pdf
    • https://s3.amazonaws.com/tinezedu/55711704284.pdf
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_eab1aa0c77da4660be055d9f38fa11b1.pdf?index=true
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_70fd8337070b4457b4016cf53c5b15d0.pdf?index=true
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_507ae69415984b2a97e84b8ac1f796e5.pdf?index=true
    • http://timojodabemisux.myartsonline.com/maytag_bravos_mct_dryer_heating_element.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_off00011278.bin
c0d7aa144ea162b58ddbb636e4afa346b4c0a38b002e20af48050e01bc9ff22a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11278 5648 bytes
font_01_sfnt_off000125b7.bin
0f753c26ea8298f2417581e1793c659e7b19e1e6282c9865582e31ea4fcfff75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125B7 11424 bytes

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