Malicious PDF — malware analysis report

Static analysis result for SHA-256 595b4c96114d953c…

MALICIOUS

PDF

83.3 KB Created: 2021-06-08 01:56:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 19aad521cd2b01a055e3f34a004be77a SHA-1: 0b883ea6b7fb11090bdb41bd462c1b1be4c9427f SHA-256: 595b4c96114d953c7c45a5417f7d63f73cd9ee78e3e37847b574668d26a38f57
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=marathi+tamasha+video+song PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/a881e2bc-4bbc-4b62-baca-f44678aaecf9/42946845437.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc371fa8-d205-4a25-8a15-0cd3ab28191f/terry_nance_el_escudero_de_dios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15988b34-f3ee-47ef-a25f-6229671d014f/altec_lansing_boom_jacket_2_manual.pdfIn PDF document text
    • http://fudejob.pbworks.com/f/fewolirabewotekezowesanaw.pdfIn PDF document text
    • http://pajajafilexe.pbworks.com/w/file/fetch/144730812/mebilaxe.pdfIn PDF document text
    • http://gafuxexosaru.pbworks.com/f/sidepegetazepaz.pdfIn PDF document text
    • http://kunozulig.pbworks.com/f/6803001024.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/180a30e2-88d0-4caa-9d88-6227f0f7afd8/zusutigitikakeveju.pdfIn PDF document text
    • http://mogulobobis.pbworks.com/w/file/fetch/144496071/dimensional_analysis_problems_worksheet_answers_chemistry.pdfIn PDF document text
    • http://kikipudojuzo.pbworks.com/w/file/fetch/144500670/inshot_app_for_pc_windows_7_free_download.pdfIn PDF document text
    • http://taxexuwej.pbworks.com/f/jawojumadorudabozowix.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/71629532524.pdfIn PDF document text
    • http://kedefoviraj.pbworks.com/f/inverse_matrix_problem_worksheet.pdfIn PDF document text
    • http://wemekojezum.pbworks.com/w/file/fetch/144671493/english_grammar_exercises_with_answers_free_download.pdfIn PDF document text
    • http://gemometis.pbworks.com/f/download_opera_browser_standalone_for_windows_7.pdfIn PDF document text
    • http://pejokawigar.pbworks.com/f/90397122679.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/dutazovujojiwugapifibuxus.pdfIn PDF document text
    • http://tusoxefum.pbworks.com/w/file/fetch/144587736/what_is_a_hammerhead_sharks_favorite_food.pdfIn PDF document text
    • http://nosegawibaso.pbworks.com/f/wuzewas.pdfIn PDF document text
    • http://bojifimaral.pbworks.com/f/the_other_side_of_the_hedge_short_story.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144522411/go_math_grade_8_textbook_answers.pdfIn PDF document text
    • http://vikiruji.pbworks.com/f/79607882087.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/w/file/fetch/144576531/square_numbers_worksheets_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599c0ab6-28d1-47c6-89a8-31e84515aab1/48616598133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5fbdc61-9b28-47e3-bbaf-e5de10f8454b/pilip.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_off0000f552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 5272 bytes
SHA-256: 2887e83fbddaf195760df65ed716ac832199b8098d6f478aa03306d67ef65d26
font_01_sfnt_off0001072b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072B 10648 bytes
SHA-256: 6dd797e6b28d48d597801ec6ead6bc383eaea4ac65a9dd480d1f6a02309a0d37
font_02_sfnt_off00012bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC4 4740 bytes
SHA-256: df2f950304217ffd2c3bfbb256cbc27bc6c64e8dfcd0fc84c4faa6323da1b9d3