Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3f848baab301efa…

MALICIOUS

PDF

70.2 KB Created: 2021-01-11 21:43:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 81ec7c586fa638eeca9e01862e5b2b8f SHA-1: 478727aa4fef181b008434e8d271afa98a3d7331 SHA-256: f3f848baab301efa93f958a53deb29588a7562d77519135f57e5d75e240c8648
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=agar.%20io%20live%20unblocked In PDF document text
    • https://cdn.sqhk.co/mebereserab/h4nhegi/wago_terminal_blocks_3d_models.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8e43979926a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5fab1312b018e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408865/normal_5ff915676e1b1.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/7ghgCgi/best_drivers_in_nascar_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473971/normal_5ff6774f4516f.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/2bx8hbu/hint_for_zombie_shooter_2_games_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/gj4ifji/87873614387.pdfIn PDF document text
    • https://site-1166610.mozfiles.com/files/1166610/tugirolisavojefegesi.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/if3LBgd/37519290573.pdfIn PDF document text
    • https://cdn.sqhk.co/rowojazur/Y3Jhhyo/7132163600.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/nisiwanolom/plagiarism_checker_for_free.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_off0000ca2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2B 5016 bytes
SHA-256: ecf1b84b7d9698a13f7f61250e0ef14d07190325774fb8e25d5020ab18795a78
font_01_sfnt_off0000db48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB48 10208 bytes
SHA-256: b19f6f50db8252072f715b9df175427913e4e260544ad656a6a88dfc5f6e076f
font_02_sfnt_off0000fde5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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