Malicious PDF — malware analysis report

Static analysis result for SHA-256 5780ebc196ab4b2b…

MALICIOUS

PDF

81.2 KB Created: 2021-03-17 01:10:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7cd818a8fe25c1e9b85de3563ede618a SHA-1: 5dd9fa4ff4a7f3afeb26eaa4be3aa4cf9b967636 SHA-256: 5780ebc196ab4b2be9b7595fee62931665175909e56b67e3dfc7fc7eb3c729d5
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into downloading further malicious content, possibly disguised as educational material.

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://seumenha.ru/strik?utm_term=fe+mechanical+practice+problems+free+pdf
    • http://kinoxca.xyz/navy_tech_fleece_nikeuhcpu.pdf
    • http://prodit.space/14771126538wbmnj.pdf
    • http://toppiksnack.xyz/18338790082rve1a.pdf
    • https://cdn.sqhk.co/josipinu/jbgfigM/zemibidilumaboruwow.pdf
    • http://kfcrabota.ru/rang_barse_bheege_chunarwali_video_songefxzu.pdf
    • http://activa-fb.com/baaghi_2_3gp_video_song_tinyjukesg5mm.pdf
    • http://vodoroding.info/how_to_create_digital_transformation_roadmapydokp.pdf
    • http://flymoney.net/25798117722s9noz.pdf
    • https://cdn.sqhk.co/waderapal/Tx7jKyY/lesawiroxedonala.pdf
    • http://ubsvp.com/5628694567jukxn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4a0f17ac-6ce6-4c05-9546-25c48d39d9f7.filesusr.com/ugd/cd79e3_2083292ef4324803811144f407525f3a.pdf?index=true
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_5af60ac04f694d3a975d39e2ad219a0d.pdf?index=true
    • https://s3.amazonaws.com/kubedukowug/bangla_movie_manik_jeet.pdf
    • https://6bc61794-ec17-45f1-96eb-8bed4cd57308.filesusr.com/ugd/217b8a_3e857b26fae4411c95b26d9915db4138.pdf?index=true
    • https://s3.amazonaws.com/tanikanaw/gukakut.pdf
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_35a7c6ea3f994ae7b284e88bd846d02a.pdf?index=true
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_fbab64f8f6ac476bb01465da0427471e.pdf?index=true
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_be304f18929c4ab0bbe1537270cd7d27.pdf?index=true
    • https://s3.amazonaws.com/bisiku/26728205368.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdf1.bin
32c85975e8bca7f53c32b51b8398546e65965a17d8a879802ee7fe4fdfdb2897		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 5488 bytes
font_01_sfnt_off00011067.bin
fcefca27d48a2f51e85d04958c4d32ab525e5b21f324dd9d10000e6d8ee35891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11067 11448 bytes

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