Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9f7726d4fd34996…

MALICIOUS

PDF

80.4 KB Created: 2021-03-21 21:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e04302cbb9a6950bb14e62d5c9f6a56d SHA-1: 23aa7a11798965a1856b5f903f6ec7a08b81e0d8 SHA-256: a9f7726d4fd34996962371f8cb5f34b48e89f400ba48b615ba26f7dea0b7b901
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a suspicious URL, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to EMDR therapy, suggesting a lure to disguise the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/strik?utm_term=what+is+the+process+of+emdr+therapy
    • http://wazasutosas.iblogger.org/37635876203.pdf
    • https://cdn.sqhk.co/giwumazusew/ifUl4VW/pogogudosidijipop.pdf
    • https://cdn.sqhk.co/vakanaju/FriaNRp/vomebajufejobusilakojawon.pdf
    • https://cdn.sqhk.co/rewufarelaze/hthjidy/android_wifi_captive_portal_detection.pdf
    • http://satomupudogoni.22web.org/jodogunafanakobatutajuze.pdf
    • https://cdn.sqhk.co/luridixajix/W1ujhgf/85955363228.pdf
    • http://kibisiji.iblogger.org/winchester_weather_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_66e84db519d8429c857fbf0bde6fe1b0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/95c51422-8938-42e0-b718-48dc59c32dbd/how_to_use_ninja_foodi_pressure_cooker_air_fryer.pdf
    • http://jomufutoxafu.epizy.com/rosegowusokovofevuj.pdf
    • http://ruwukag.epizy.com/puxug.pdf
    • https://acaa17bf-cf2e-4132-a9e9-810271eb8bc4.filesusr.com/ugd/ab5b4c_37ca837c2f3941db91a5a1bd28bb7080.pdf?index=true
    • https://uploads.strikinglycdn.com/files/65e5ec66-16c8-4072-b9bb-9129e79b617f/can_you_connect_record_player_to_soundbar.pdf
    • https://ebcfae26-b4e4-4f1a-a5b2-c5bdbddc1bdf.filesusr.com/ugd/259f90_a59846c818d64046b7e4b4ea210b94d0.pdf?index=true
    • http://mejojaka.epizy.com/18217109600.pdf
    • https://ac65beef-1c88-4b01-a948-251493ed82f2.filesusr.com/ugd/09857b_a914a801b95d4005bc08067f19b27e0a.pdf?index=true
    • https://6776ac3f-883f-499f-bc52-38dff818ec46.filesusr.com/ugd/969751_04cc1552b39949679648ab4315703041.pdf?index=true
    • http://wivifizurata.epizy.com/billboard_top_100_songs_2018_free.pdf
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_117a11d37a1e4e8b83b6163c7742c0a0.pdf?index=true
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_c5af4b18e40c4a1bada4661e8dc4668f.pdf?index=true
    • http://tezebidurob.epizy.com/84956757594.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0dd.bin
37818b54546c2aa34040feac6108b548f6cdfde0d0585adc2656a3e87d2c5a57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DD 5160 bytes
font_01_sfnt_off0001027d.bin
288f818dd70517f7119912bc67a71c3e53c45e0b2d33e88acc99cb8a9f2f6326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1027D 10424 bytes
font_02_sfnt_off0001262b.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1262B 4324 bytes

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