Malicious PDF — malware analysis report

Static analysis result for SHA-256 237e02caf8c2c15c…

MALICIOUS

PDF

74.9 KB Created: 2021-03-25 17:57:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: edf92a68924569d7688991975f3b62e2 SHA-1: 9e3d6c3f3caa3fd28f9cdbdc20239615dae273a3 SHA-256: 237e02caf8c2c15c819de75bf6ec4f44ad4a8ed42cada4374ae1198b50967fb3
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting it's used for phishing or to serve a malicious payload. The document body, though heavily obfuscated, contains keywords related to medical conditions, likely serving as a lure.

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://lozipotod.ru/award?keyword=anuria+oliguria+pdf PDF link annotation
    • https://cdn.sqhk.co/jibenapola/Esge5hf/bukuvurikixiwov.pdfIn PDF document text
    • https://cdn.sqhk.co/xojugako/ifiigLw/14968618974.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/akrK2jf/rainbow_snake_in_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/Nrhd6hh/zombie_clash_royale.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/jb2ijij/demotezididap.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvaratuji/hjgeWtY/go_down_the_mountain_book.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/gfUgeia/never_have_i_ever_netflix_cast_russia.pdfIn PDF document text
    • https://cdn.sqhk.co/livukigelo/gj0haQP/suzegasagukaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a813053b-8769-4f91-9943-0106aec7cd9f/fufakuke.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/55495225033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1508a47f-0c36-40df-a4f1-fa7908b029b4/microsoft_office_project_2013_32_bit_download_for_windows_10.pdfIn PDF document text
    • http://gemimixobisuju.epizy.com/52802153278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9a46a5-8d72-4b4b-9235-3949549c4820/multiplication_and_division_basic_facts_worksheets.pdfIn PDF document text
    • http://fukogalijikufoz.epizy.com/53493321718.pdfIn PDF document text
    • http://fobegagefim.epizy.com/1996_ford_ranger_issues.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/kajokozele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70e80a00-13a3-45ba-b206-2cf43e88d0ab/tutuvuvoxigutifetagigilo.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/what_is_a_commercial_motor_vehicle_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/23316494600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b7a992-48e4-4048-81f2-200680539618/lord_i_need_your_grace_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/executioner_s_chariot_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/38417679297.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE649 5020 bytes
SHA-256: 33592946c1d5821641de4ecb280cc30ffb7d15774395995ee913c67f5e15eb6d
font_01_sfnt_off0000f76e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76E 11628 bytes
SHA-256: b4c8727a7d55d8c854bffd805de88f741323a4bcba96b196f2c40d0c2e5df77d

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