Malicious PDF — malware analysis report

Static analysis result for SHA-256 9645f8f7f7ebde3d…

MALICIOUS

PDF

77.3 KB Created: 2021-01-01 07:53:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4d50cafa1c577e18a09a91e2b7bed282 SHA-1: d7b539ebe27e7690254a8131c8156f24d61d298c SHA-256: 9645f8f7f7ebde3d42499dfc76c02e670415fa34cd7a2260809594daebc5f3b7
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector URL, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of a malicious URL suggests an attempt to redirect the user to a site that likely hosts a malicious payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=free+dos+games+download+full+version In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388421/normal_5fd96acab99bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5f90731ccd445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_5f9bd12eef8ae.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/e4a8e7f9-804d-46e4-9862-9c7184c6572d/19997977104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc6fdf0-b46c-4baa-9157-5037fe71f1e8/pamovunigetimurebixawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df81407-add9-466c-8ef4-1960d42687f6/my_heart_will_go_on_mp4_video_downlo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66ba5777-aca4-4ab6-85c5-da1472257d8d/asset_inventory_management_excel_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/402d22a2-05e6-4f3e-a456-f8ac4e6fc310/48864102580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ff1846-6000-4586-bebd-70c5e814aaca/florida_writ_of_possession_personal_property.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fcbd177-0df8-48e7-b08f-0d60b2399183/nba_summer_league_reddit_stream_pelicans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/845962e5-43c3-4360-a89b-c01358b2e83e/neil_gaiman_american_gods_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/551989fb-9964-424b-8ee1-d83a4c7444c0/fazibefotatesemepabawize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91cea449-897b-4225-b59f-26575192bdbe/68197121581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894f19cb-565c-49cf-8c05-0693b07f1471/the_crucible_audiobook_act_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04d680a1-b686-4c5d-94b7-7f0ad8686518/xolemitiwiridi.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_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 5336 bytes
SHA-256: b7f9f600d4bf7799db02d448750a4d9f9d8c6b67367141d34edf308140a59f9d
font_01_sfnt_off0001031c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031C 11024 bytes
SHA-256: de4777de08d9c557a46b6d0649f8216c7c070045f891e2751f70e32a32aa3e87

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