Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f11f951b35a155…

MALICIOUS

PDF

65.3 KB Created: 2021-06-01 16:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 638ee04cbe6e97d2c146a27e004b7e0c SHA-1: 9975650a1633b77d54f12c100e1042e25511d4f1 SHA-256: a5f11f951b35a15519587fe17083333aafe458e8661c8d9234c6853863f7c74f
154 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO manipulation or to distribute malware. The ClamAV detection and ML classifier indicate malicious intent, specifically flagged as 'Pdf.Phishing.Trojan'. The presence of numerous links, including one pointing to a potential software crack, suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5630

Heuristics 4

  • 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
  • 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://pixomot.ru/pbw?utm_term=what+is+bright+lending
    • https://static.s123-cdn-static.com/uploads/4365583/normal_5fec410e645f1.pdf
    • https://mivebomuponi.weebly.com/uploads/1/3/1/3/131398008/6603049.pdf
    • https://gokejaxax.weebly.com/uploads/1/3/6/0/136056436/miwonomij_fawezoputu_muzema_zubivikuxo.pdf
    • https://cdn-cms.f-static.net/uploads/4385876/normal_60463f22d5f96.pdf
    • https://cdn-cms.f-static.net/uploads/4468270/normal_603bbe78351cb.pdf
    • https://zilifanaj.weebly.com/uploads/1/3/4/4/134444715/4243432.pdf
    • https://cdn-cms.f-static.net/uploads/4390996/normal_5fe60da2a6c90.pdf
    • https://xabesokexiba.weebly.com/uploads/1/3/4/3/134327988/9887864.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jotoxipigi.pbworks.com/f/creo_3.0_download_with_crack_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/f1d7aa74-3af4-40da-93ab-bd0bcee832f5/linux_shell_commands_cheat_sheet.pdf
    • http://gazumadu.pbworks.com/f/69916256653.pdf
    • https://uploads.strikinglycdn.com/files/6495370c-91f9-4c1d-bc4d-caa9704295a0/74786705248.pdf
    • https://uploads.strikinglycdn.com/files/4bca7dfb-3142-4834-a3a0-232f0d8b9a35/53343953452.pdf
    • https://uploads.strikinglycdn.com/files/e866613f-40ba-42bd-a9f1-7f35f19abaae/ford_mustang_ecoboost_premium_2018.pdf
    • http://kufujibumufa.pbworks.com/w/file/fetch/144424044/english_file_upper_intermediate_students_book.pdf
    • https://uploads.strikinglycdn.com/files/e5b6c82e-b1b7-46a5-a4a2-8895cf1a288d/good_socratic_seminar_questions_for_lord_of_the_flies.pdf
    • https://uploads.strikinglycdn.com/files/392cc8ac-fd6c-474a-bff0-a17e44099497/old_sat_scores_online.pdf
    • https://uploads.strikinglycdn.com/files/2d310193-4371-4665-8cba-a8fe55357ea0/how_much_is_a_2012_jeep_liberty_sport_worth.pdf
    • http://munonoraze.pbworks.com/w/file/fetch/144457569/how_do_i_know_if_my_guinea_pig_is_dying.pdf
    • https://uploads.strikinglycdn.com/files/30d5dca3-6eba-4089-907e-29cf1d818f21/33278544932.pdf
    • https://uploads.strikinglycdn.com/files/73cd26eb-4065-465b-9690-414fd2509d58/how_to_heat_a_costco_spiral_cut_ham.pdf
    • https://uploads.strikinglycdn.com/files/7ced37bc-0a22-433d-bf91-9ee30d8d434d/63420144942.pdf
    • https://uploads.strikinglycdn.com/files/c4c75a52-4121-4214-8bbb-4eb9c6cc9568/87748311931.pdf
    • https://uploads.strikinglycdn.com/files/d97cd2ed-0dbb-4ee4-905a-85b2f729ac8a/how_much_does_a_technology_engineer_make_a_year.pdf
    • https://uploads.strikinglycdn.com/files/42ed3e1c-f5ad-4ad5-9a4d-bad11a72d305/biodata_format_for_marriage_in_bangladesh_doc.pdf
    • http://zewalar.pbworks.com/f/kobagazogu.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df84.bin
1f7f4ccc3086e502118178208efef907f8602d6185a85b0585dc64a815a942cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF84 5240 bytes

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