Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ec3a758d818ed3…

MALICIOUS

PDF

80.3 KB Created: 2021-04-08 06:19:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07b06c8352b08b7b134ff7f3007fdfec SHA-1: a4c78d13919380b80f52b9c34a568b787396722c SHA-256: 32ec3a758d818ed3a6bac426cc961ed21d19d54af21082e81ed8daee91aa1627
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, specifically flagged as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a quiz answer key.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://midufefew.ru/wix?keyword=11.4+meiosis+visual+quiz+answer+key
    • https://cdn-cms.f-static.net/uploads/4470218/normal_5fd97ff4b8312.pdf
    • https://static.s123-cdn-static.com/uploads/4419001/normal_5ffa83c636350.pdf
    • https://cdn.sqhk.co/rirelolut/figvrgd/switzerland_covid_19_cases_per_day.pdf
    • https://cdn.sqhk.co/rorajakura/fjbreSI/plumbing_pipe_connection_types.pdf
    • https://cdn-cms.f-static.net/uploads/4426424/normal_5fdb0ba4e23c4.pdf
    • https://cdn.sqhk.co/zaviresodew/SJUgige/mod_pizza_near_me_directions.pdf
    • http://tanuwoxomasosog.22web.org/velobodutagoxisiselibaf.pdf
    • https://cdn.sqhk.co/ropobemuma/cdgeohc/beautyplus_magical_camera_2016.pdf
    • https://cdn-cms.f-static.net/uploads/4478398/normal_602a203645737.pdf
    • https://cdn.sqhk.co/xeloxilava/hhjijik/vejoweb.pdf
    • https://cdn-cms.f-static.net/uploads/4408460/normal_602c7f040efcd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pajeriramal/jiposi.pdf
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_b41aca8af0e44e1ea8d7ae6b82cadf24.pdf?index=true
    • http://jovupoxorunalox.epizy.com/xozixejifakefujo.pdf
    • http://pepebejawu.epizy.com/descargar_busuu_premium_apk_gratis.pdf
    • http://pidawuz.epizy.com/ace_2018_test_series_mechanical.pdf
    • http://koxogulu.rf.gd/morphology_of_flowering_plants_neet_notes_download.pdf
    • http://tasijojaludet.rf.gd/jovaxamowifavizaxadi.pdf
    • http://gegavolaful.epizy.com/kepalev.pdf
    • http://ginodoto.epizy.com/tajuvini.pdf
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_9d3b3fd08f4f4f47806959f662e67e89.pdf?index=true
    • http://tumesit.rf.gd/fresnel_biprism_notes.pdf
    • http://xizajitidug.rf.gd/sutewisuzamaguvu.pdf
    • https://s3.amazonaws.com/satulibaren/is_big_little_lies_available_on_hbo_on_demand.pdf
    • https://s3.amazonaws.com/fajixe/68381651859.pdf
    • https://s3.amazonaws.com/rujabepifar/aops_geometry.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_off0000fe7c.bin
6842bbbb3236d3a1d90d883265e71673d44e39c134d0d058168cc5dd1ed3752e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 5400 bytes
font_01_sfnt_off000110f6.bin
c28282f2337925e608d8ca83bddcf0881f5967510bda84ea1e1a5d43f21300fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 10152 bytes

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