Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d349d8d647733e0…

MALICIOUS

PDF

72.2 KB Created: 2021-02-16 19:41:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: caa4c30734bc465f9bf18d99b893d381 SHA-1: 93795b53467dadf0ccbec40867e969ba911df00c SHA-256: 1d349d8d647733e093f50665b8bb0744f45d9c25c178f2dbf3caf20c1025b717
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, masquerading as an 'evolution study guide answer key'. This URL is the primary indicator of a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=evolution+study+guide+answer+key PDF link annotation
    • http://dawajilimomod.iblogger.org/fepesap.pdfIn PDF document text
    • http://letilemugemin.66ghz.com/60607824434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/83357980653.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/xurujugobeli.pdfIn PDF document text
    • http://wadarudi.epizy.com/bolaza.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/employee_registration_form_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/basic_instinct_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/indian_constitution_at_work_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/nijadetabalafases.pdfIn PDF document text
    • http://nadiripu.epizy.com/21620654020.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/fojinolodilewu.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/ashrae_standards_for_hvac.pdfIn PDF document text
    • http://mupopeseri.rf.gd/8_parts_of_speech_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/rumaretupugidekomomod.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/kemenedupojapulatufu.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/determining_spinner_probability_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/clasificacion_de_los_animales_para_nios.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_off0000ddf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF3 5268 bytes
SHA-256: 6b937310cf13dec2c615ffab6d36cf8895d771af6e8b50c83acd5312ad21711c
font_01_sfnt_off0000f00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00C 10512 bytes
SHA-256: e68b31df56d4aa2931e277fd4799c660a348be807f143a74ef701fbcc2711a16

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