Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fe2956e249fb82…

MALICIOUS

PDF

72.8 KB Created: 2021-02-22 02:41:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 10e8115c37dd1492a7fbe3dcfbb423ad SHA-1: e6105a58fe33a8b91586381802431ebe1ded2ac5 SHA-256: e8fe2956e249fb82c8a551ea84e89ebceee92bf355798ac8eb5860fae25cd564
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. The embedded URL and the document body, which mentions 'Gmat guide 2018 pdf free download', suggest a lure to trick users into downloading further content. The PDF structure and the presence of external URIs indicate an attempt to exploit vulnerabilities or deliver a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=gmat+guide+2018+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4467926/normal_6003cdde967a4.pdfIn PDF document text
    • http://urott-hu.com/twitch_alerts_not_working_on_streams7a04b.pdfIn PDF document text
    • https://latapelubatute.weebly.com/uploads/1/3/5/9/135960370/3732101.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5ff06bc392c19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407989/normal_6022531b91245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478687/normal_5fcbf545938c2.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/2297821.pdfIn PDF document text
    • http://zespodsvetkoy.site/38040191321f3jlh.pdfIn PDF document text
    • http://kowekigoduze.iblogger.org/resumen_del_capitulo_la_compuerta_numero_12_de_subterra.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ff4d08245431.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484364/normal_5ff71ac46b2cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446147/normal_5ffbf7f6ae06b.pdfIn PDF document text
    • http://fruittea.space/lokupugovezamujammcv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_601123a11d5f5.pdfIn PDF document text
    • https://depularo.weebly.com/uploads/1/3/4/6/134601330/1922374.pdfIn PDF document text
    • https://fejunula.weebly.com/uploads/1/3/4/3/134363834/1599758.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469358/normal_5ff772c3d7201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://limekukojaso.epizy.com/69348336363.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/human_skeleton_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/juginefur.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/51333172021.pdfIn PDF document text
    • http://kolofagigetu.epizy.com/25_year_anniversary_invitation_templates.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_off0000dd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD06 5824 bytes
SHA-256: c65d3f251c480089525179c291cbe0bf27e3c38fc6ce58ac60460b2b904b31bb
font_01_sfnt_off0000f0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 10796 bytes
SHA-256: 489c047e78ef25c1bb581fbe6b495b756a1c7a0aada65793ea20e9f82736fabb

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