Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddd797eb7aeee79…

MALICIOUS

PDF

131.2 KB Created: 2021-04-27 12:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f70108ce7e2955273649a102aa5f3924 SHA-1: fa262ffd65ad9d0eec39b4917104a44724c7a59f SHA-256: 3ddd797eb7aeee79ac31e4eb8fb0cf4326089af24a21bf8a1a0e097078db1e30
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. It contains an embedded URL that appears to be a lure, disguised as a search result. The presence of this URL suggests the document is designed to redirect users to a potentially harmful website for phishing or malware distribution.

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://pelibifir.ru/strik?utm_term=what+is+the+future+of+usps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368251/normal_601468cadbc07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449410/normal_605d419e4d795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405902/normal_601468e3b5a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478134/normal_601d781ddcb8e.pdfIn PDF document text
    • https://cdn.sqhk.co/wexazaruko/jaAtgjC/peppa_pig_surprise_eggs_walmart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_6033acb91e84b.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/DIjjMic/squad_vs_zombies_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dipewoduge/8idaITk/cute_pink_backgrounds_for_laptop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475383/normal_5fdc165f726de.pdfIn PDF document text
    • https://cdn.sqhk.co/nadokikado/bijKkdM/sagajeloduzipife.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/igiiRjd/tisogumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_6037a6ba8f353.pdfIn PDF document text
    • https://cdn.sqhk.co/lupejatuwi/jhdthgY/secure_folder_iphone_7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zopenave/padagaregesanavo.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/samsung_rugby_4_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53212c26-dbfc-433a-b103-4913bd93ecf3/28904007530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31454e9c-0e72-4b74-833a-6a7577c1994b/18807465042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3dd757f-0be5-45d5-978d-93f4dd766fce/janarupewulaxatuwuwagas.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/igcse_electrochemistry_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/nevoxaburavizus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B930 4748 bytes
SHA-256: af67d5ebc5dee71224753147727480892001b44bde2ce94733b3b79d5d77125d
font_01_sfnt_off0001c974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C974 11752 bytes
SHA-256: 6e89b38de74ae1e06b692efca293b64949926c5130fc6edd713d1e77a7ec4fa3
font_02_sfnt_off0001f150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F150 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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