Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bf299d752fdf180…

MALICIOUS

PDF

79.7 KB Created: 2021-04-26 04:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb750fbb1280e271bd71ae84422305a7 SHA-1: 280611d01fa34a5bced8e6c9ab0ac4d308e92d55 SHA-256: 7bf299d752fdf18089475bfb27b2f7e66fdeb91a59ae3988727fa716ff928120
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to software, likely intended to trick users into visiting the malicious URL for a malicious download or further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=rslogix+5000+and+studio+5000
    • https://cdn.sqhk.co/letarezetap/2fjdugc/candomble_religion.pdf
    • https://static.s123-cdn-static.com/uploads/4373779/normal_5feb68ed311ba.pdf
    • https://cdn.sqhk.co/jenireni/ghfggDE/ccse_checkpoint_study_guide.pdf
    • http://zijozarub.mygamesonline.org/guia_autometrica_junio_2020.pdf
    • http://paselon.getenjoyment.net/65514137152.pdf
    • http://nitapida.mywebcommunity.org/how_to_get_digital_code_from_gamestop.pdf
    • https://cdn-cms.f-static.net/uploads/4489609/normal_604946ac15500.pdf
    • http://wewofif.scienceontheweb.net/81522764816.pdf
    • http://pifedalune.medianewsonline.com/apple_mini_dvi_to_mini_displayport_adapter.pdf
    • https://cdn.sqhk.co/vulovosovem/giFhjba/s10_stock_ringtones.pdf
    • https://cdn.sqhk.co/jotapepikota/gdphjhj/xbox_series_x_restock_date_after_launch_day.pdf
    • https://cdn.sqhk.co/xafukapewe/YgcoQia/64300949136.pdf
    • https://cdn-cms.f-static.net/uploads/4379380/normal_6013cbf374d53.pdf
    • https://cdn-cms.f-static.net/uploads/4388827/normal_602269a900bc9.pdf
    • https://static.s123-cdn-static.com/uploads/4454041/normal_5fe34ac10fb09.pdf
    • http://jolixasij.sportsontheweb.net/db2_sql_error_sqlcode-904_sqlstate57011.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_4ef87eeccacb4424be9dd69b9e79da96.pdf?index=true
    • https://d9c73feb-c945-4d97-9d44-ff62a4b57c47.filesusr.com/ugd/12056e_2635b371abb24748a05d7e720bcdabe0.pdf?index=true
    • https://068ba8bc-08b0-4b68-8151-f3c59c7a5775.filesusr.com/ugd/5a4aad_a15b4e47a427470096fcf475085e3166.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fe1e6dc8-f964-4d2b-b5eb-af1c7e5c884e/79928841886.pdf
    • https://uploads.strikinglycdn.com/files/9857b0d2-1711-4a56-bce9-5d5cfed8f2f9/how_to_set_heater_on_panasonic_air_conditioner.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_off0000f56d.bin
7bdb6e785f56640f693670dd5067488027cf1fe3816f19f47237a45d7ce33467		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF56D 5240 bytes
font_01_sfnt_off00010762.bin
d856efc79f1a3989a394e59329b08ab8e34191890fe3ee759bab9821f767822e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10762 12980 bytes

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