Malicious PDF — malware analysis report

Static analysis result for SHA-256 764d1765dcdd916f…

MALICIOUS

PDF

90.4 KB Created: 2021-03-24 04:11:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8cb28cdd3da4d196fac084a553eabd4a SHA-1: bbbc5ce54a40b4992e486865a49d3c4ff12b4c29 SHA-256: 764d1765dcdd916fb2af9d56b1aaae9c2dd9f0717c6524020141824f2e91874a
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://botokaw.ru/strik?utm_term=how+to+read+f+table+for+anova PDF link annotation
    • http://tetoxukipim.getenjoyment.net/guritivibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477162/normal_600d2c1c010ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495050/normal_604ad264ebcae.pdfIn PDF document text
    • http://tezijexipilimo.getenjoyment.net/attractor_factor_italiano.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/minerales_alimentos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_6020f99092392.pdfIn PDF document text
    • http://fobativ.mywebcommunity.org/pusokobamiwidezitulev.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/55341500692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390057/normal_5fdcb68788252.pdfIn PDF document text
    • http://tidemelewofu.iblogger.org/73809538355.pdfIn PDF document text
    • http://dopelozaf.22web.org/33309435968.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dac46c2-13d2-4587-a4eb-4fef3b5fcb79/86025394828.pdfIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_25d47ea750b2414baf317a79053de0bb.pdf?index=trueIn PDF document text
    • http://bibobega.epizy.com/leveling_guide_classic_wow_zones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57077297-7ece-4bc3-b85f-57a7acc00e2e/misakorisemuxezinakas.pdfIn PDF document text
    • http://lavapokapajemob.myartsonline.com/statistical_quality_control_seventh_edition.pdfIn PDF document text
    • http://gimomegujo.epizy.com/franz_kafka_best_short_stories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6be999f-3dee-4e8f-8046-927a8fc32c58/48283383805.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_b6abeca14bc4465a87490f6d08125ee2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bed6a01-ce99-4fa9-b62e-aeaeb908f079/52784492406.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/advantages_and_disadvantages_of_internal_style_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ff81d46-512b-4490-8fe9-e3da62eb489d/47449621504.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 4976 bytes
SHA-256: fa75332ffd8b2d7d0504fd9cc22ecba4610eb1b72cea9699aae6114afadfde7d
font_01_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 11784 bytes
SHA-256: d94c336058d7165029aa5f09e902c8a6a5991d0274365722adc77f9aef54c301
font_02_sfnt_off000145d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145D2 16452 bytes
SHA-256: 59e033023a2c5e65a7dc813edb0c8b8ac08c70356d4556a56a50b1a0937bc3b1