Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8ae982a2680d56…

MALICIOUS

PDF

81.7 KB Created: 2021-04-20 15:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5eef2ab55f3ee738b5629f13e179d10f SHA-1: 77edf7ac8ef155536b5a66be61eb80b4ddc76f9d SHA-256: 4f8ae982a2680d5690c1fdd3f85f7ea1c74b71baeeec86f4c7ba269df850f0e7
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a command-line interface, a common tactic for executing downloaded payloads. The embedded URL points to a suspicious domain, likely serving as a distribution point for malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://dafemum.ru/strik?utm_term=install+kali+linux+programs+on+ubuntu
    • https://cdn.sqhk.co/datawafag/jgNI6Nf/smith_s_adjustable_angle_knife_sharpener_review.pdf
    • https://cdn.sqhk.co/janawezexoj/id94ibc/20296258544.pdf
    • https://cdn.sqhk.co/fokivetezabu/QgfVhay/loguvudifara.pdf
    • https://cdn-cms.f-static.net/uploads/4426088/normal_605681c61d6d5.pdf
    • https://cdn.sqhk.co/kinemefuwa/jbgihgM/gimogojazazotijusimalunu.pdf
    • https://cdn.sqhk.co/gasupewu/gLcr4yF/zitalugozogemunozek.pdf
    • https://cdn-cms.f-static.net/uploads/4388060/normal_603f400449cc7.pdf
    • http://dizurexemubegog.mygamesonline.org/shodhganga_mathematics_project.pdf
    • http://nuzabokazovuwa.iblogger.org/anhydrous_ammonia_sds_sheet.pdf
    • http://vavexefane.mypressonline.com/silberman_varaona_ortopedia_y_traumatologia.pdf
    • https://static.s123-cdn-static.com/uploads/4368956/normal_5fce2e3d34c06.pdf
    • http://vanimerukaguto.scienceontheweb.net/a_dance_with_dragons_archive.pdf
    • http://regudak.iblogger.org/glencoe_8th_grade_science_book.pdf
    • https://static.s123-cdn-static.com/uploads/4384150/normal_5ff839495dd4d.pdf
    • https://cdn.sqhk.co/sojetaji/Kg5xheO/chess_pie_recipe.pdf
    • https://cdn.sqhk.co/bokirebi/hxhfVfE/new_rnb_music_2020_list.pdf
    • https://cdn-cms.f-static.net/uploads/4443342/normal_60527e7a8b8f4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lomekezuki.rf.gd/28508660285.pdf
    • http://pedovebewazafuv.epizy.com/bufizexi.pdf
    • http://suvowafavij.epizy.com/handbook_of_attention_deficit_hyperactivity_disorder.pdf
    • http://fezivadijar.rf.gd/4198580954.pdf
    • http://zofumorejo.epizy.com/he_who_rides_a_tiger_bhabani_bhattacharya.pdf
    • http://verafewema.rf.gd/doxububirupobomijet.pdf
    • http://nujilexulajuwup.atwebpages.com/headway_beginner_free_download.pdf
    • http://satawakerexe.atwebpages.com/78511514442.pdf
    • http://birifamabaxum.rf.gd/raj_bapna_mind_power_techniques_in_hindi.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_off0000ea99.bin
90e07ae9ed99741307f5bd5bafe87f25a97fbebc9dada391479b52c67f209155		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 5112 bytes
font_01_sfnt_off0000fbd3.bin
1efdc2b27272f64b47e187e4fd07ba180c95bed8610a6cc18ca42d7ece738c7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 17784 bytes
font_02_sfnt_off00012920.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12920 4324 bytes

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