Malicious PDF — malware analysis report

Static analysis result for SHA-256 55645d64f6a9b36d…

MALICIOUS

PDF

91.9 KB Created: 2021-03-15 03:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9907fce38de6b714673d973a75a1e3e SHA-1: 5ce7ed0fa03e472910fc690389222bf114b7d1a8 SHA-256: 55645d64f6a9b36d106c005b77b2f48c3907e6b5fd63bf69b2b3e57c2945b2bb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, 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 corrupted document body suggests an attempt to obscure the true content or exploit a rendering vulnerability, further supporting a phishing or malware delivery motive.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/wix?keyword=te+extra%25C3%25B1o+amor
    • https://cdn-cms.f-static.net/uploads/4468554/normal_5fd67f68ecdaf.pdf
    • http://satotanubajedo.iblogger.org/la_bibliothcaire_gudule_gratuit.pdf
    • https://cdn-cms.f-static.net/uploads/4375696/normal_600c9c211108f.pdf
    • https://static.s123-cdn-static.com/uploads/4393515/normal_5ff55b491b5e4.pdf
    • https://static.s123-cdn-static.com/uploads/4383921/normal_5ff4cc5265c97.pdf
    • http://wipababotuzuke.iblogger.org/student_centered_learning_activities.pdf
    • https://static.s123-cdn-static.com/uploads/4422135/normal_5fe4e2699becd.pdf
    • http://detarekowopowub.22web.org/colored_corrugated_paper_sheets.pdf
    • https://static.s123-cdn-static.com/uploads/4446762/normal_5fe17ca933790.pdf
    • https://static.s123-cdn-static.com/uploads/4456686/normal_5fec388431eea.pdf
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5ff9a78cbe88c.pdf
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5fd7dba172775.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/110c4f1d-92b8-4029-9116-5d9d2371632f/motorola_minitor_v_battery_change.pdf
    • https://uploads.strikinglycdn.com/files/92f3eae6-57a9-446d-8e90-f0d99ebf5dad/37151580912.pdf
    • https://uploads.strikinglycdn.com/files/61fc623a-7446-4bd4-823c-1ffdf84ae794/english_literature_jobs_abroad.pdf
    • https://uploads.strikinglycdn.com/files/bf4e8414-635b-4a1c-9956-57f6418514d8/what_is_the_wealthiest_country_in_asia_per_capita.pdf
    • http://getapumofibejop.epizy.com/faringoamigdalitis_bacteriana_nios.pdf
    • https://uploads.strikinglycdn.com/files/0f7c8a51-1a2a-420c-aad1-45db2e357ee3/jolelorixozejudixasobi.pdf
    • http://wubezirinipo.epizy.com/they_say_i_say_with_readings.pdf
    • https://uploads.strikinglycdn.com/files/bfd42bd6-31d5-4ee9-ad69-a221d2562228/veretileguduvix.pdf
    • https://uploads.strikinglycdn.com/files/4476724a-3fa3-48ae-a649-47240f91e19d/88000427648.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_off000129e6.bin
af203eccae296fa57e12465df41e094ce720c81624583979b5efbf24a65f8dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129E6 4848 bytes
font_01_sfnt_off00013a0b.bin
5a133a834b9fd70d19cc799af2525223bdf67ac9bbd971d70dd2ac440debcacf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0B 11952 bytes

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