Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce34327629743bc…

MALICIOUS

PDF

77.1 KB Created: 2021-03-14 13:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 445473b34625e9f01cfbf35fe22609df SHA-1: ed82cd6d7c1eb75e9cfb2b5ac5c438cd7134c970 SHA-256: dce34327629743bcea753a002d1de762427f1dc7f77e12b35fb9fa204dc72aa3
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan and ML classifiers. It contains an embedded URI pointing to 'jumiwimov.ru', which is likely a malicious domain used to host phishing content or distribute further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI and the malware detection strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/123?utm_term=datafilehost+amapiano+2019
    • https://static.s123-cdn-static.com/uploads/4460447/normal_5feee0584f20a.pdf
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5fc60b4487522.pdf
    • https://cdn.sqhk.co/vovewotutal/4kmbCYO/love_letters_for_girlfriend_to_impress_her.pdf
    • http://joteruzawareba.iblogger.org/faded_piano_sheet_easy_letters.pdf
    • http://xafopawiki.medianewsonline.com/mowutevukoxubaj.pdf
    • https://cdn.sqhk.co/mifijizudi/ieBjajg/the_walking_dead_road_to_survival_clementine.pdf
    • http://bisapusid.mypressonline.com/zofidutodifedexomoru.pdf
    • https://cdn.sqhk.co/nuvaratuji/hhhhir5/58036579041.pdf
    • http://fasekafalig.scienceontheweb.net/moxutowuvolafulazu.pdf
    • http://kanudivuvim.iblogger.org/xbox_one_wired_controller_cable_length.pdf
    • https://cdn.sqhk.co/mivijigonof/difJjj2/infinity_song_one_direction_mp3_download.pdf
    • http://zibodotuf.mygamesonline.org/biology_form_4_chapter_1_notes.pdf
    • http://rigudozefogo.mypressonline.com/msi_990fxa_gaming_cmos_reset.pdf
    • http://palikexifumalam.mywebcommunity.org/arduino_tutorial_tutorialspoint.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fixadamobus.epizy.com/year_end_financial_statement_template.pdf
    • http://naranosufok.atwebpages.com/klasifikasi_caulerpa_racemosa.pdf
    • http://pabewuvuxaf.onlinewebshop.net/81610652549.pdf
    • https://uploads.strikinglycdn.com/files/f4607ee5-ff53-40fb-b3fd-1128538457af/what_is_the_portal_system.pdf
    • https://uploads.strikinglycdn.com/files/81e59031-01ff-46cb-b0aa-e48cc55d17b2/ketizasixikidunan.pdf
    • https://uploads.strikinglycdn.com/files/eebb0e78-8a7e-447e-a304-4fab34d2634b/total_line_thermostat_troubleshooting.pdf
    • http://wosolebaxuwutux.rf.gd/zabulajem.pdf
    • https://uploads.strikinglycdn.com/files/dbd33380-c65d-4f76-9a4f-d11ae3e3ae09/samsung_remote_control_bn59_problem.pdf
    • https://uploads.strikinglycdn.com/files/d58dcd9d-94b2-442b-8529-f2da65e195d3/43114111738.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_off0000ed1c.bin
1530121d656668ee273c7e5baab9476c056d32eff7b93244a67897d62eb8656b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 5524 bytes
font_01_sfnt_off0000ffca.bin
bf93d00b6f73dd3e0e1aca0a6a4bbb84d2c014c7b9cff90e36b149439d3116a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 11140 bytes

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