Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bbb3999e08fc17f…

MALICIOUS

PDF

74.5 KB Created: 2021-03-08 13:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 021947f69679438a29dc805ed9518997 SHA-1: 255e2f174a93d7f64ec00858f096d9d8c86928d6 SHA-256: 3bbb3999e08fc17fbc4b899a0fd55bc35db64ef85be2b73bf13628f04d8bbcbb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious domain, masquerading as a learning resource. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/award?keyword=learn+basic+html+and+css+pdf
    • https://rodelifefi.weebly.com/uploads/1/3/0/7/130776661/1ed21fc7c4eaa3.pdf
    • http://xevamoz.mygamesonline.org/14414126636.pdf
    • https://vobelorigod.weebly.com/uploads/1/3/4/0/134096073/4586676.pdf
    • http://likefetevu.getenjoyment.net/history_of_the_entire_world_i_guess_original_video.pdf
    • https://siresikewutawin.weebly.com/uploads/1/3/0/7/130739490/6181661.pdf
    • http://kiwenalod.medianewsonline.com/goflex_home_reset.pdf
    • https://vavaxomutiposev.weebly.com/uploads/1/3/0/7/130738712/d179d1b4be70727.pdf
    • http://vorecan.space/tactics_for_listening_basic_second_editionh13st.pdf
    • https://velonifiwivuli.weebly.com/uploads/1/3/0/7/130739758/forinadunoxekoxesez.pdf
    • http://zikewexer.scienceontheweb.net/59215478315.pdf
    • http://zanovekolasin.mywebcommunity.org/how_to_make_a_12v_li-ion_battery_pack.pdf
    • http://oneshops.space/azar_app_hack_apkamlt9.pdf
    • http://shoop-fp.ru/how_to_install_eso_addons_manuallykw46r.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/82b41c59-80ac-4c8b-8fd4-1f6fe1b4284f/35298884143.pdf
    • https://uploads.strikinglycdn.com/files/fcd99524-91be-4fc6-a313-fe3f2737c23e/ap_language_and_composition_synthesis_essay_outline.pdf
    • https://uploads.strikinglycdn.com/files/0a4cda7b-2bae-4b42-b691-22d1b60dddcc/my_summer_infant_monitor_says_no_signal.pdf
    • https://69a21580-3c80-4f81-8097-1ec0bc18215d.filesusr.com/ugd/bd7df1_6d4ca7c2490749c3bd50685ca48df03e.pdf?index=true
    • https://0503187d-52cd-4237-9521-a3cb9bf551ae.filesusr.com/ugd/5bb01c_b3fc4c60afd2423eb8fe1360829ca290.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0a3aca61-8e2a-4b47-8341-821beada0d6b/how_do_you_find_your_subnet_mask_and_gateway.pdf
    • https://a49aa754-465e-4bbd-924e-b3d0e7b66bd4.filesusr.com/ugd/81d6a4_3e09147ac86a4c41876042c04dc3d415.pdf?index=true
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_b9f849a49b374f2eb831d84d2f9a8985.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3940b669-24c9-482b-b6af-2f9f02e6e0d9/jesus_calls_today_promise_verse_in_english.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_off0000e79c.bin
c99d9058b237d5ab296072372ca8f32104429d44f47599c01232bfb7ff0cbea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE79C 5476 bytes
font_01_sfnt_off0000fa0f.bin
99cc72635ff722d4fa90dd59f4188c4ee17ddf8d96e31736e545b207cf17b809		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0F 10104 bytes

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