Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8f74226a4bebc4…

MALICIOUS

PDF

73.5 KB Created: 2021-06-01 17:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: edab8834aa5338df0c386ed9c4efae3d SHA-1: b13d4d5dc011e072624b3a454c7c24c5dd841d1b SHA-256: 8e8f74226a4bebc40f8bc230d097261e1d1d256b62c73d3964c43f032963b8a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://synerhu.ru/pbw?utm_term=htet+syllabus+2020+pdf PDF link annotation
    • https://kijudizi.weebly.com/uploads/1/3/4/3/134321523/4281657.pdfIn PDF document text
    • https://wofixoxabovu.weebly.com/uploads/1/3/4/5/134524794/3588651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478393/normal_602cb889f0f95.pdfIn PDF document text
    • https://dolumipekino.weebly.com/uploads/1/3/4/6/134625527/8250520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_606b3e3605200.pdfIn PDF document text
    • https://dogulusowugol.weebly.com/uploads/1/3/4/4/134493498/4de86616cecb34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_60642af888691.pdfIn PDF document text
    • https://danuxuzajuzawo.weebly.com/uploads/1/3/4/7/134768569/4452334.pdfIn PDF document text
    • https://tumirovuwepilu.weebly.com/uploads/1/3/4/6/134603677/6953498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369138/normal_60605c2d892cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nilanom.pbworks.com/f/global_competitiveness_report_ranking_2019.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144414921/91451976792.pdfIn PDF document text
    • http://japomajuxire.pbworks.com/w/file/fetch/144442563/1119101995.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852f0701-5e67-468d-91e9-92244ef0fdb8/9264107142.pdfIn PDF document text
    • http://xorunezagu.pbworks.com/f/geometry_section_6.7_dilations_worksheet_answers.pdfIn PDF document text
    • http://zekodunu.pbworks.com/w/file/fetch/144441915/60716895801.pdfIn PDF document text
    • http://jotoxipigi.pbworks.com/w/file/fetch/144454935/what_is_the_reading_order_of_the_house_of_night_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a147ef8-170b-4046-954f-363a934f944c/janutajonirosibamib.pdfIn PDF document text
    • http://kufavuva.pbworks.com/f/simple_past_tense_interrogative_negative_sentences_examples.pdfIn PDF document text
    • http://wekibivu.pbworks.com/w/file/fetch/144434229/dokodurul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4a4ac3-91ce-4e9b-baaa-77bdace692e5/kidajid.pdfIn PDF document text
    • http://viluxese.pbworks.com/f/can_i_use_wireless_mouse_receiver_as_bluetooth.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C6 5416 bytes
SHA-256: b57a71a5689790c0a07ba9aec9a74ed2cacaefa026624dbc8b607a497720d106
font_01_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 10408 bytes
SHA-256: a5540ed9744ddab678fa8b1c2ecad467db3c1cee3a86f3ae5b8f22cf8e9f452c

Open this report in the interactive analyzer, or submit your own file for analysis.