Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1a24fc180e4be3…

MALICIOUS

PDF

82.6 KB Created: 2021-03-17 01:10:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74c29245b90db8fcd30acf04d8953cb9 SHA-1: 7a0ef8da7bcc4d19e4e97c4ca8a6661ac91e3bf4 SHA-256: ed1a24fc180e4be39a75f929a1728464d3e9c6ddde746c4e60f0aaa32937eb06
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to product information.

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://jacksth.ru/award?keyword=apc+smart+ups+1500va+lcd+230v+pdf
    • https://cdn-cms.f-static.net/uploads/4369313/normal_6011b9901dfa4.pdf
    • http://lenugaguv.medianewsonline.com/wigejujunojadini.pdf
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/zuzikazowikusavux.pdf
    • https://mewasopaligesar.weebly.com/uploads/1/3/1/4/131454012/baziziv_katufixeb_katufopoba.pdf
    • https://bowilidorufe.weebly.com/uploads/1/3/4/6/134603038/4653dca940e8.pdf
    • https://cdn-cms.f-static.net/uploads/4489733/normal_602e28df34e36.pdf
    • https://cdn-cms.f-static.net/uploads/4410201/normal_602025d7771ca.pdf
    • https://cdn-cms.f-static.net/uploads/4389074/normal_6023f021ee782.pdf
    • http://fosipuzo.mypressonline.com/water_crisis_in_cape_town.pdf
    • https://cdn-cms.f-static.net/uploads/4417118/normal_603446ec4ed95.pdf
    • https://cdn-cms.f-static.net/uploads/4413563/normal_600e980ca74a5.pdf
    • https://cdn-cms.f-static.net/uploads/4468531/normal_604782586fa5e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ddf64d59-5240-4154-9987-17dfc28e22c7.filesusr.com/ugd/cec570_010b0ad57a24425da47b0785eb11e9c6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/22d8c62e-129e-4b43-9565-10dbfc2a90ba/ti_30x_iis_scientific_calculator_walmart.pdf
    • https://uploads.strikinglycdn.com/files/b9de37d8-ba86-4641-a581-713b6de9e0e1/what_are_some_good_warm_up_exercises_for_basketball.pdf
    • https://uploads.strikinglycdn.com/files/b6b3b970-0b81-46bf-b549-0e5074ca7a65/ejercicios_de_escritura_para_nios_de_primer_grado_de_primaria_para_imprimir.pdf
    • http://nakixaxev.myartsonline.com/arobnjak_iz_oza.pdf
    • http://mozaninukokefef.onlinewebshop.net/70443913091.pdf
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_6f1f5b93bad441b38b22e7dc96773a75.pdf?index=true
    • http://maretubozewugi.myartsonline.com/linear_synchronous_motor.pdf
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_85df3587763249bfab81ca82533119f8.pdf?index=true
    • 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_off00010141.bin
8877e01f84c260cfe949be81a6842b94a329bec4c8350cb2ceae3c6e0423a943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10141 5964 bytes
font_01_sfnt_off0001158a.bin
7805399ad3fdb84a42696ed709faee229883e46ea65aba0091250cf8798d2ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1158A 12084 bytes

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