Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdec7cb8281ee4a4…

MALICIOUS

PDF

88.5 KB Created: 2021-04-04 20:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 03a0f17e0ee76f945c5d7a555931019c SHA-1: 5b6212765a43de3445473234b8c77259f73eab1c SHA-256: cdec7cb8281ee4a49af71fcdcfa261fb6d3f79c7a85bfe0d3900699dca6b545d
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, indicating a phishing or trojan payload. 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, suggests a lure related to 'mechanisms of evolution worksheet answers'. No scripts were extracted, but the presence of external URIs and the overall detection profile suggest the document is designed to lead the user to a compromised resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://soxebez.ru/wix?keyword=mechanisms+of+evolution+worksheet+answers
    • https://cdn-cms.f-static.net/uploads/4392441/normal_60477eefdfee0.pdf
    • https://cdn-cms.f-static.net/uploads/4369163/normal_6040693f513a5.pdf
    • http://dusibarupuguli.medianewsonline.com/18938764444.pdf
    • https://cdn.sqhk.co/toxotunem/OjegcAB/jurassic_world_evolution_pc_game_cheats.pdf
    • http://bugosegu.scienceontheweb.net/calibre_increase_font_size.pdf
    • http://xofofumireke.mypressonline.com/diccionario_de_armando_hoyos_descargar.pdf
    • http://lobabinuladeri.medianewsonline.com/pdf_to_word_file_converter_android_app.pdf
    • http://xomerisupudegop.medianewsonline.com/revolikigafigogijajoz.pdf
    • http://vufajed.getenjoyment.net/96454606346.pdf
    • https://cdn.sqhk.co/dijabidasu/fih1hdm/1249194578.pdf
    • http://warupipujamoru.sportsontheweb.net/cbse_examination_bye_laws_2020_19.pdf
    • http://lubenoredeji.mypressonline.com/nasevexad.pdf
    • http://wisatemubudu.medianewsonline.com/cp30_batching_plant_manual.pdf
    • http://pemotutafid.mywebcommunity.org/public_speaking_rubric.pdf
    • https://cdn-cms.f-static.net/uploads/4368777/normal_605f2b4c4076c.pdf
    • https://cdn.sqhk.co/bepesewutu/u2jiPgj/terranova_s_italian_restaurant_bunnell_fl.pdf
    • http://zomixuxoluzijum.mywebcommunity.org/spoken_english_syllabus_for_beginners.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fuguzametekobo.myartsonline.com/52152893147.pdf
    • http://bodirinukamole.onlinewebshop.net/gujutepogifewosesibudesu.pdf
    • http://sinusisokopex.atwebpages.com/thumb_isometric_exercises.pdf
    • http://jabejanaboz.atwebpages.com/21011431386.pdf
    • http://jabodegodonirad.atwebpages.com/maths_practice_worksheets_for_class_5.pdf
    • http://xejobutek.onlinewebshop.net/11342916812.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa1a.bin
3d377061ff80ba0ae3ccc52036247e02246de812633d493414158372868e53d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1A 5224 bytes
font_01_sfnt_off00010bc1.bin
c6e1bd2fd7acd6db5fc54485d7751f572cfee195862c7943441ed197704dc624		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 10592 bytes
font_02_sfnt_off00013023.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13023 16204 bytes
font_03_sfnt_off00014551.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14551 4324 bytes

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