Malicious PDF — malware analysis report

Static analysis result for SHA-256 c155c15632cf764a…

MALICIOUS

PDF

86.6 KB Created: 2021-03-07 16:51:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc920d900130c335ed93132e28808523 SHA-1: d4ccef8e18fedbe5d585bcfc715f1ff74e31ff57 SHA-256: c155c15632cf764a1f81e70eeafdd5dad7b876a5663315f6eacad090bb4785e1
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan distribution. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, with one prominent URL being https://lozipotod.ru/wix?keyword=linkin+park+castle+of+glass+mp3+song. This suggests the document's primary purpose is to redirect users to potentially harmful websites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-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://lozipotod.ru/wix?keyword=linkin+park+castle+of+glass+mp3+song
    • https://cdn.sqhk.co/lowixadoges/gcgduK8/97187348292.pdf
    • http://ketosimple.online/reported_speech_in_spanish_exercisescjik9.pdf
    • http://netlysy.online/personalized_blank_sheet_music_bookcyppw.pdf
    • https://cdn.sqhk.co/bulelovuroga/cEgc2LL/nba_2k20_locker_codes_ps4_october.pdf
    • http://profapp.pro/lobefasuxonagukedu6pj54.pdf
    • http://rivalo130.com/best_law_dictionary_app_philippines2pmc2.pdf
    • https://cdn.sqhk.co/winogolelog/irOjc8z/alien_escape_movie.pdf
    • https://cdn.sqhk.co/nosimasiv/JQie1uV/recarga_claro_chile_gratis.pdf
    • http://form-lnstagramverifiedbadges.com/36367852031e75zp.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_cc4589c3c41a412195fa90f8ddb72f1a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/61da4c04-00c5-4c48-b0ad-8156a8b2ab00/dell_optiplex_gx620_drivers_download_for_windows_7.pdf
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_1904d12738ae47a292b44f6dcd09fac3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e10e36b9-0c35-4911-8993-a4cb78b22faa/la_recherche_du_temps_perdu_2011.pdf
    • https://s3.amazonaws.com/didowugorokirug/do_judgements_appear_on_your_credit_report.pdf
    • https://s3.amazonaws.com/xezonijida/tiludiso.pdf
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_4ab83c2add414fe9a20cbb689b87a0d8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b0ef5e6f-d45a-4d5a-9b14-151d61f4116d/24302377701.pdf
    • https://uploads.strikinglycdn.com/files/3875b0ad-a313-499d-b96f-68757aed8ecd/buludisebifido.pdf
    • https://uploads.strikinglycdn.com/files/5d5823b1-d4a3-4a8a-a104-1472d485d585/noxumutadazuliso.pdf
    • https://uploads.strikinglycdn.com/files/0844078b-d238-4f5a-a333-b951a01a0943/echo_cs-400_chainsaw_18_bar.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc3.bin
5052e7549f676f47890f7ebe34b5dfc7397adcc11588a6cbbb14b501bf1a5901		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 5504 bytes
font_01_sfnt_off0000ff75.bin
491472296003772cf34c1d31c9529ec4f0a47df5e60119da4bd5bc6cef03156d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF75 14588 bytes
font_02_sfnt_off00012cf2.bin
96ab3042575e6db92b7bad1aac42ed8095504d59665b3326cf7857e97d54a14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF2 18776 bytes

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