Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada59399dbf2ac92…

MALICIOUS

PDF

75.9 KB Created: 2021-03-01 01:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0789f79d91df033f54eb798ce8f011d0 SHA-1: b68b2ea9d7f31e9bb21e15cba59acbfa2a93a457 SHA-256: ada59399dbf2ac9243c323d5de340adc24e8b78ed9b3192b050a9c665a3fd7d3
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV and an ML classifier as malicious, with a high risk score. It contains an embedded URL pointing to 'seumenha.ru', which is likely used for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to educational content, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/strik?utm_term=what+is+a+metaphor+and+simile+and+an+example PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372384/normal_601d3302ec390.pdfIn PDF document text
    • http://summer-italy.fun/97816681599g0esy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423443/normal_600ddbca6df5e.pdfIn PDF document text
    • http://katipef.medianewsonline.com/fred_factory_orders.pdfIn PDF document text
    • http://changely.club/cuanto_es_100_gramos_de_azucar_en_cucharadas6q7bf.pdfIn PDF document text
    • http://vowitufafuzebil.scienceontheweb.net/92679339774.pdfIn PDF document text
    • http://ig-copyrightnotice.com/toraboxeroxasada80r.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/80809976158.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/40413816290.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453336/normal_5fe52b2cc1e3c.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/moxalonajojewebajup.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/is_navy_corpsman_a_school_hard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489713/normal_6031d812df883.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/vososasoxumete/auto_glass_repair_south_gate_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/lifud.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/vezufemumaruv.pdfIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/report_lost_drivers_license_queensland.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/archery_master_3d_mod_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/p90x_workout_diet_plan.pdfIn PDF document text
    • http://bugenerefajujus.atwebpages.com/genukopefexejasibop.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/japan_guide_tokyo_day_trips.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_off0000edbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBC 5280 bytes
SHA-256: 4c6b6db9cb147af0f78202c884f7d2c2c3dd3d446a08f9b654046a0284a2fb74
font_01_sfnt_off0000ff8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 10260 bytes
SHA-256: 650d7086c876f3c9cd4fc2751b817a02971c329927550aaec89e6d17fbcf01e9

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