Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9359e910cf387e6…

MALICIOUS

PDF

105.6 KB Created: 2021-04-03 07:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfe859d520b8e2616207c4902c747b76 SHA-1: e69a194e4636ee3d87281429f36f797e8e0f1507 SHA-256: e9359e910cf387e6a72d05d8b96563ec1dccd5f2887da6298e5350dacf0991db
96 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 an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain a lure related to teaching a child, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://ponafet.ru/strik?utm_term=how+to+teach+an+18+month+old+no
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5feaed9e12b4f.pdf
    • https://cdn-cms.f-static.net/uploads/4410190/normal_6050ca9ed4ec5.pdf
    • http://geesecam.com/teacher_observation_lesson_plan_templatelgue9.pdf
    • http://praktika-ingenieur.com/82492021643uajs2.pdf
    • https://cdn-cms.f-static.net/uploads/4451752/normal_60626415d2e34.pdf
    • http://datab.vip/between_facts_and_norms_reviewxryi9.pdf
    • http://drive4mclanemilwaukee.com/vokanavunuzizoxugokolugpef.pdf
    • https://cdn-cms.f-static.net/uploads/4450038/normal_606796d6bc96c.pdf
    • https://static.s123-cdn-static.com/uploads/4458407/normal_5fe312ef94c50.pdf
    • https://static.s123-cdn-static.com/uploads/4449172/normal_6007c29691541.pdf
    • http://folivapizi.66ghz.com/resonifoza.pdf
    • http://navaram.online/21320378119zftau.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kaxogesidod.epizy.com/somazoxefujera.pdf
    • https://s3.amazonaws.com/xurixado/audiobook_app_android.pdf
    • http://lopilizunutevo.rf.gd/23411777378.pdf
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_e095508bdf234c4f8976e4842b864fdd.pdf?index=true
    • https://s3.amazonaws.com/toguvaju/gipibemivezagariwo.pdf
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_853c2b52e436475596776bb66198bf11.pdf?index=true
    • https://s3.amazonaws.com/gixawetopoli/sodawosevowewa.pdf
    • http://bigefonivibog.epizy.com/2831300508.pdf
    • https://s3.amazonaws.com/popilo/skyrim_best_mod_load_order_pc.pdf
    • https://abee6ad4-cf47-459a-954e-22b9b9bb30ad.filesusr.com/ugd/4bdc6d_a1f264acbae04d1d8906d82ce071d3fa.pdf?index=true
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_47c72154beb5490589395048f6fe5f7f.pdf?index=true
    • http://teludajugupasi.epizy.com/allyn_and_bacon_guide_to_writing.pdf
    • https://s3.amazonaws.com/wulagisi/georgia_guidestones_2014_cube.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000156a7.bin
5c8f92011cfadc6cc1e30b551b3ea9092516a999ca9aab31d7258ea169ef0280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156A7 5204 bytes
font_01_sfnt_off00016841.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16841 1800 bytes
font_02_sfnt_off000170cf.bin
3b6a8692b4658b684ba6cbe4446049fb53c6b2d9dbf5b2d5fa678109c478ca9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x170CF 11712 bytes

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