Malicious PDF — malware analysis report

Static analysis result for SHA-256 4beba1ee09812d5e…

MALICIOUS

PDF

75.2 KB Created: 2021-03-25 08:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc0e5191d83fe9de4de0697019763058 SHA-1: 5e857b6cbc65b8c43344d20e61a97887ccb83410 SHA-256: 4beba1ee09812d5efdc26aeeb4e3cd7b400194826fe3b77b77eef7a7bc049c24
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name of Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0. It contains an embedded URI pointing to a suspicious URL, 'https://seumenha.ru/strik?utm_term=intermediate+microeconomics+syllabus', which is likely part of a phishing or credential harvesting attempt. The document body, though heavily obfuscated, suggests a lure related to academic material.

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://seumenha.ru/strik?utm_term=intermediate+microeconomics+syllabus
    • https://static.s123-cdn-static.com/uploads/4384045/normal_60010a5f17342.pdf
    • https://kunobozawi.weebly.com/uploads/1/3/1/4/131453145/397c604f1.pdf
    • https://makigutezun.weebly.com/uploads/1/3/4/7/134707077/598744.pdf
    • http://wewudiwiwojob.22web.org/hobart_tv_guide_free_to_air.pdf
    • https://bezatawe.weebly.com/uploads/1/3/0/9/130968967/286a25460.pdf
    • https://regenapewafixun.weebly.com/uploads/1/3/4/3/134364718/kuwuge.pdf
    • http://savuwit.iblogger.org/2084506414.pdf
    • https://static.s123-cdn-static.com/uploads/4460231/normal_6008ed1bc8ea0.pdf
    • https://cdn-cms.f-static.net/uploads/4409411/normal_60488cc957633.pdf
    • http://raxewaponoxiv.mygamesonline.org/how_do_i_know_if_my_record_player_needle_broke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pafemovokixap.rf.gd/26498031539.pdf
    • http://xapafov.epizy.com/comcast_dvr_price_per_month.pdf
    • https://uploads.strikinglycdn.com/files/feea22f8-94b5-46bc-8f70-38ca1be28049/how_to_set_up_oot_randomizer.pdf
    • http://kebenubes.onlinewebshop.net/wimpy_kid_book_in_order.pdf
    • https://uploads.strikinglycdn.com/files/a68941df-fad6-46e9-97c4-c33e2a1cdb73/data_science_and_big_data_analytics_course_in_bangalore.pdf
    • https://uploads.strikinglycdn.com/files/078a0378-42a8-4861-b3f6-be096c1f141c/arkansas_drivers_license_test_center.pdf
    • http://xonuxaxilajol.epizy.com/46538852911.pdf
    • http://ziwemasux.myartsonline.com/voxejodabosu.pdf
    • http://fivilupagikozil.rf.gd/world_war_zero_ironstorm_ps2.pdf
    • https://uploads.strikinglycdn.com/files/d08b14b9-90cf-475a-8a14-3732cde71508/tovojuxaseluvusopezo.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_off0000e742.bin
dc4622bb611d480a8153502333677e26240630f79e59bf0ee0eb1a7a2695f1d5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE742 5264 bytes
font_01_sfnt_off0000f90e.bin
c8642ce6790cf266b7fb36499fc60cf0de5c6d3d6826c1c755d24177b8170b26
pdf-font-stream PDF embedded font (sfnt) at offset 0xF90E 11352 bytes