Malicious PDF — malware analysis report

Static analysis result for SHA-256 4541a3ef92ca541b…

MALICIOUS

PDF

100.3 KB Created: 2020-12-28 20:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 29b78db5ad214c5af8d569a81685926f SHA-1: d4fae0320ef7e2d98ce2a0f3abf9e575178ae097 SHA-256: 4541a3ef92ca541b349ab05986cd5d0b9da365b0cc0e8930b9c14d10c615398d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to malicious content. The document body, though partially corrupted, contains text related to 'Guilty Gear Strive release date', suggesting a lure to entice clicks on the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://gettraff.ru/strik?utm_term=guilty+gear+strive+release+date In PDF document text
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5fe0c09a15fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_5fc13de92f62b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5fc185c98e1ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426967/normal_5fbbb61793a75.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/Xibgfgj/nasa_science_investigations_plant_growth.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370540/normal_5fceaaac895bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fd3d2fb1cb66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_5fb854698d9e7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nokiva/icse_full_form_ki.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/aqa_gcse_english_language_examiners_report_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37c1c1d-3568-4c82-b149-ba00cae899a2/ralibokanuvopupinusuvavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c581131-2b5b-4d77-9f56-f729d522ec0d/how_much_does_it_cost_to_build_a_highway_bridge.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/transformar_celsius_a_rankine.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/oppo_f1s_new_android_version_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51969f86-6a7a-4736-a6e3-7b5bd779bc8d/powosepekituwega.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11289 10872 bytes
SHA-256: 2b6e90ba20c0ff9a3c519fb36c4cc0a27d0dacffea241684a430c7d5bb6111b7
font_01_sfnt_off00013693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13693 5188 bytes
SHA-256: e7d7054ff3dca3b9398d2efca5d7e2556e405ed8f9d153093e38e700b976de88
font_02_sfnt_off0001485c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1485C 11192 bytes
SHA-256: dbc5fc93a9dc40e6957b620c41f8eae0d2b5539f1f271b3417f8fce64a772a4d
font_03_sfnt_off00016e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E7A 16164 bytes
SHA-256: 8a02c072109af67031be64374fa0b0107fc8569691e792053b23713e8e8f99b2

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