Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61ae0855d92d6c3…

MALICIOUS

PDF

75.2 KB Created: 2021-03-28 16:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6b422fa9ebd678f767e0738b4dfc904b SHA-1: dd0b687db191d528ecd07e016cb18347b89821a5 SHA-256: e61ae0855d92d6c3188512694f5cf63a34280eec98e9a605e2884c75fd98d65f
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. While no scripts were extracted, the document's structure and embedded URLs suggest it is designed to lead users to potentially harmful external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=convertir+de+pdf+a+word+gratis+editable In PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://domensita.fun/section_8.1_covalent_bonding_worksheet_answersyymwe.pdfIn PDF document text
    • http://atomyimperial.ru/universal_laser_systems_m300_driver4qy7l.pdfIn PDF document text
    • http://dorodirebupekel.iblogger.org/interview_skills_questions_and_answers.pdfIn PDF document text
    • http://sayseedokg.com/nidumezanepukizanabekozj12o.pdfIn PDF document text
    • http://xebiniseba.mygamesonline.org/zolpidem_10mg.pdfIn PDF document text
    • http://itdiscounts.info/mini_games_for_pc_windows_10_free_downloadpk4on.pdfIn PDF document text
    • http://aduo5.online/868246846348klqy.pdfIn PDF document text
    • http://aydym.club/7472556083t9m74.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/hunter_x-core_quick_programming_guideaay0u.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/what_is_research_design_by_different_authors.pdfIn PDF document text
    • http://visetazide.medianewsonline.com/banana_fish_manga_completo.pdfIn PDF document text
    • http://bimovixexena.scienceontheweb.net/report_writing_example_for_students.pdfIn PDF document text
    • http://idealicacolumbia.site/something_beatles_piano_sheet_music0qph7.pdfIn PDF document text
    • http://rerubin.space/santa_cruz_bronson_2015_size_guideyhenc.pdfIn PDF document text
    • http://dimax.website/mixed_second_and_third_conditionals_exercisesvktxk.pdfIn PDF document text
    • http://ketadiets.site/81205691843n2li9.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
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_b9272a96c00241e79518b11d42f50266.pdf?index=trueIn PDF document text
    • http://matunojusorim.epizy.com/calculer_un_chiffre_d_affaire_prvisionnel_formule.pdfIn PDF document text
    • http://wubifut.rf.gd/how_to_read_gdp_chart.pdfIn PDF document text
    • http://rovafitazilom.epizy.com/putokerisob.pdfIn PDF document text
    • https://b5b764bc-4fc6-48d7-9a4b-423a4d05f225.filesusr.com/ugd/3f2390_1a19c67b978c41cf9f78822899cbe6ae.pdf?index=trueIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_b6af3d2ea11b412088fa10dac52faa22.pdf?index=trueIn PDF document text
    • https://f92484db-e5b4-41f8-9431-508412042773.filesusr.com/ugd/b04c15_e43d59576c16422084252b1124a7ae6d.pdf?index=trueIn 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_off0000da27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 5312 bytes
SHA-256: 53fee5d0cadeca6a7fb6d786015355b7bb477115a7c4abc958edf5d35756e634
font_01_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 11468 bytes
SHA-256: cafd3bffa81619db615d15f0f246056c75f2717d21c21672b467350ab1cd117c
font_02_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333