Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d99eafb3af3a16…

MALICIOUS

PDF

79.7 KB Created: 2021-03-08 13:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3f4e0b8602b08325a28f429027613893 SHA-1: 0625d54f5f1aaaa8dbc20de1f24f4462ab2aadbe SHA-256: 10d99eafb3af3a16ba0cd1fc8747172d5855b3075c09c5c73fe7958f4e645fe8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/award?keyword=breadboard+projects+for+beginners+pdf PDF link annotation
    • http://zakofuta.66ghz.com/35758992195.pdfIn PDF document text
    • https://cdn.sqhk.co/gixelotopa/ihaoJN2/indoor_water_parks_in_waco_texas.pdfIn PDF document text
    • http://kinoxca.xyz/tosogowigoxexea8nhv.pdfIn PDF document text
    • http://afracheat6.xyz/sony_vpl-hw40es_projector_review42fet.pdfIn PDF document text
    • http://xuriretijidaja.22web.org/samamegulopekafu.pdfIn PDF document text
    • http://e-sparks.ru/software_project_estimate_template_exceltwipb.pdfIn PDF document text
    • https://cdn.sqhk.co/gozigawefo/bgfPgiK/96317445197.pdfIn PDF document text
    • http://digitaloffice24.ru/multinomial_logistic_regression_spss_change_reference_categoryp9aaj.pdfIn PDF document text
    • http://mklhhhh.space/data_structures_and_algorithms_interview_questions_and_answersih4va.pdfIn PDF document text
    • http://questotzvezd.space/bikugufodiwerusopidpqw1z.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/hiiiigq/kartal_safari_bar.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/ugchihi/inside_out_2_release_date_2020_uk.pdfIn PDF document text
    • http://jizimawaguda.22web.org/incident_report_sample_in_warehouse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuwopugivowivo.rf.gd/poster_design_template_online.pdfIn PDF document text
    • http://pibimosozo.rf.gd/lightning_mcqueen_colouring_sheets.pdfIn PDF document text
    • http://dakovupogoz.rf.gd/92469844935.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/bupowikesupuvepevogebozo.pdfIn PDF document text
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_34ff3547dae2410392d807cb6068a54c.pdf?index=trueIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_4d759308851d4d5f93d3fc932199be5d.pdf?index=trueIn PDF document text
    • http://tifoxirekurox.epizy.com/corporate_governance_powerpoint_template_free.pdfIn PDF document text
    • http://zuronixo.rf.gd/dofakeleke.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_off0000fbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBE 5556 bytes
SHA-256: c628cbf406de83f2c66a85995f3ea9df71d6dc23879b78e4030ccbfa44b40a18
font_01_sfnt_off00010eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB5 10220 bytes
SHA-256: 2c321add1299ca351cee8c2a93c85e8254cb474ae9d9a2adc781b477e20043e9

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