Malicious PDF — malware analysis report

Static analysis result for SHA-256 099e8ad46486daf1…

MALICIOUS

PDF

77.6 KB Created: 2021-06-01 08:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: b734e92b27ca92a39816a4b0cb91122d SHA-1: 0c64b8de62ce13c098eae0a8c4681e036c7d25a1 SHA-256: 099e8ad46486daf1606de5a9ab7f7d4f06e9043c632bf25b283ecd732662c5ee
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on 'https://nomylo.ru/pbw?utm_term=25th+wedding+anniversary+wishes+for+parents+in+kannada'. Heuristics indicate this PDF is part of a link farm on disposable hosting, and ClamAV detection confirms it as 'Pdf.Phishing.Trojan'. The document body, though heavily obfuscated, contains text related to anniversary wishes, suggesting a lure to disguise malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://nomylo.ru/pbw?utm_term=25th+wedding+anniversary+wishes+for+parents+in+kannada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412170/normal_5fe1b0c6ccbdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365542/normal_6036f2eb4e17f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489722/normal_6068211ad0d88.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jajafad.pbworks.com/w/file/fetch/144423369/bekhayali_song_free_download_kabir_singh.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/w/file/fetch/144422373/how_long_it_takes_for_tadpoles_to_turn_into_frogs.pdfIn PDF document text
    • http://pamotekegopa.pbworks.com/w/file/fetch/144439587/68309937168.pdfIn PDF document text
    • http://gazumadu.pbworks.com/w/file/fetch/144432915/53860932790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a033b8-26dc-4b5f-b9ae-49218307f0b0/kung_fury_hackerman_gif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261f404c-c620-4407-bc0f-eae427907a7c/go_math_textbook_grade_5_answer_key.pdfIn PDF document text
    • http://pokuwatosat.pbworks.com/f/how_to_calculate_cronbach_alpha_for_likert_scale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d919110-03a3-4853-8394-abd091ac8e4e/pokmon_black_2_and_white_2_primas_official_strategy_guide.pdfIn PDF document text
    • http://pagorevet.pbworks.com/f/can_you_get_netflix_on_ipad_mini_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cebab11-bf59-45b2-adcf-18d4e829424a/mechanical_drawing_tutorial.pdfIn PDF document text
    • http://paderukut.pbworks.com/f/braun_silk_epil_9_manual_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b9a1b0-55b9-43a8-82e9-7b7088a5b574/how_to_calculate_maturity_date_in_excel.pdfIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144420459/51806729983.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/w/file/fetch/144447273/bts_images_hd_for_dp.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/w/file/fetch/144426912/lafosupoborijov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43b7d260-3f43-42af-a75d-46fc4015759e/the_language_of_composition_3rd_edition_activity_answers.pdfIn PDF document text
    • http://xofitesu.pbworks.com/w/file/fetch/144448137/86265127780.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/how_to_setup_a_sharp_alarm_clock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c73e7fa4-9e24-42c9-9e2e-410f06ac8c60/longman_anthology_of_world_literature_volume_a.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/102576c1-8d0d-48a2-b307-ed847dc9a3c1/monot.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144414237/17188455202.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e466.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE466 5536 bytes
SHA-256: 133b02e4e40837b2fe8cd4464e825e1cfab268cc8be2daa14c22a96c9310e443
font_01_sfnt_off0000f74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 10328 bytes
SHA-256: 696e195d2b6589cc026842b0c1cd1e771403e5ddf9156012e5aba51ef97013cd
font_02_sfnt_off00011a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A57 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34