Malicious PDF — malware analysis report

Static analysis result for SHA-256 170e36516a4e67a8…

MALICIOUS

PDF

76.9 KB Created: 2021-02-12 22:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e0c49bcc5ff46da14d25597257583862 SHA-1: 61e6a7355ca4640074329b63283c9c1265b8a633 SHA-256: 170e36516a4e67a8aed8caeb4da9f0e9874b36fc405354002d5c4ba8b3186a47
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and one prominent URL related to 'jasper report pdf template'. The presence of these links suggests the document is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=jasper%20report%20pdf%20template PDF link annotation
    • http://gikadoketu.iblogger.org/apresentao_online.pdfIn PDF document text
    • http://tapabafana.22web.org/vabomezalezawuxamenotefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497353/normal_602637773dd4e.pdfIn PDF document text
    • http://gafujovinotu.22web.org/event_background_design_template_psd.pdfIn PDF document text
    • http://sojuvofud.22web.org/development_plan_templates_free.pdfIn PDF document text
    • http://bukibiroxofin.22web.org/circuit_analysis_cheat_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_6023057d1d838.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefisapuvekebi.epizy.com/pauper_stompy_guide.pdfIn PDF document text
    • http://sojuwumupipijo.rf.gd/championship_manager_3_mac_free.pdfIn PDF document text
    • http://baverasoge.epizy.com/84907691011.pdfIn PDF document text
    • http://gamovomubapo.rf.gd/poultry_production_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/chicago_citation_format_footnotes.pdfIn PDF document text
    • http://fasemejatafa.rf.gd/corrugated_plastic_sheet_48_x_96.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/samuel_barber_adagio_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/95072541558.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/dopolos.pdfIn PDF document text
    • http://ruxududomaba.epizy.com/life_skills_outcomes_worksheet_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/burnout_drift_seaport_max_apk.pdfIn PDF document text
    • http://mixonanax.epizy.com/aqa_biology_third_edition_textbook_answers.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_off0000ea48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA48 5176 bytes
SHA-256: 2dcd3107a230099cb1c3bc4c5b8472c31aa9285eeb3f919a8e834072b4fff8ff
font_01_sfnt_off0000fbd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD0 13032 bytes
SHA-256: 7b86a018b7688072b5361a70765183f2a325c6d3f646db63907eab80ef2bc390

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