Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daf3612d576a5e8…

MALICIOUS

PDF

78.5 KB Created: 2021-03-11 09:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93533597065e8e9316108fc9b3da849d SHA-1: 1772948debd1ee0018907630f114fceb4be48db1 SHA-256: 6daf3612d576a5e82c6a21a6bbb11130604b4e6122ca33ccfbb0ff00107e5359
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-farmed to appear as legitimate search results for various topics, including software tutorials. The primary URL, 'https://resalured.ru/award?keyword=blender+2.+79+tutorial+pdf', suggests a lure to a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/award?keyword=blender+2.+79+tutorial+pdf
    • http://domastmsk.space/kendo_grid_popup_editor_template_mvc_validation0qew4.pdf
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/vedanogapex_pozatumodi.pdf
    • http://segwaywheelchair.ru/pride_and_prejudice_by_jane_austen_full_moviebf046.pdf
    • http://vidapabil.22web.org/incident_report_police_form.pdf
    • https://zemaxixose.weebly.com/uploads/1/3/4/6/134636511/xegazo.pdf
    • http://rolevuses.iblogger.org/juzevadigemenixuw.pdf
    • https://dodonixufaf.weebly.com/uploads/1/3/1/4/131453867/kodixim_fabumuf_vegirefiwofu_mudumop.pdf
    • http://jorolog.22web.org/concussion_management_guidelines_australia.pdf
    • http://getliterate.online/45077068924q1b7w.pdf
    • https://gofuzuxelizexo.weebly.com/uploads/1/3/5/3/135391542/4093251.pdf
    • https://netexebi.weebly.com/uploads/1/3/0/8/130815192/2755025.pdf
    • https://cdn.sqhk.co/lunosupi/deg8Iih/temple_run_2_game_in_ios.pdf
    • http://reform-st.ru/19162827092yifkc.pdf
    • https://cdn.sqhk.co/sisagoku/HjH4Cii/89230512891.pdf
    • http://wunutomerar.iblogger.org/can_you_make_monkey_bread_in_a_bundt_pan.pdf
    • http://levantemosaic.com/handwritten_notes_for_class_12_chemistry_downloadc28rk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sivigowukom.epizy.com/malachite_green_solution_safety_data_sheet.pdf
    • https://07d68bf2-0661-47e2-9ffe-eae068a071af.filesusr.com/ugd/fef806_ef0ea96b95e64114a48f57e6c8bd5578.pdf?index=true
    • https://580b68e3-2104-4118-ae5b-4f285de1c062.filesusr.com/ugd/dad7b5_f492bb9201ac4a1384b350d06cad9bc8.pdf?index=true
    • http://zomusuxine.rf.gd/7365569893.pdf
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_4d28765d889f49f895e1acefa3348e74.pdf?index=true
    • http://jotikovan.rf.gd/dunder_mifflin_commercial_song_piano_sheet_music.pdf
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_d13903614571403f90b8b1109e9f4c65.pdf?index=true
    • http://kisuneronebel.rf.gd/26022565244.pdf
    • http://nerepigov.rf.gd/behringer_umc22_guide.pdf
    • http://gakupoxefale.epizy.com/30317669159.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_off0000f71f.bin
b97a69e733f8e0b365b1aed0692a17003a4700a3f6c1d3cfd9fd178b4a70e5fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 5308 bytes
font_01_sfnt_off00010940.bin
ec471ab8e76c8703f4267aa491cde4619c1f4b81654ad1ac635a5a28912d36f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10940 10348 bytes

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