Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24bf47293a05781…

MALICIOUS

PDF

84.5 KB Created: 2021-03-11 03:44:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 567b63d17e0cb794536be72eaeb741de SHA-1: f859c37147b66b9c3c3278a590b0094f37a50edb SHA-256: d24bf47293a057814d963a133c2e4ec33a5ed08d34bf8cc2e8a5045c2303dbd8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or phishing. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier and ClamAV detection strongly support the malicious verdict, indicating this PDF is designed to distribute malware or lead users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://vilenefex.ru/award?keyword=bargaining+for+advantage+summary+pdf PDF link annotation
    • https://cdn.sqhk.co/pojuzijix/1hbjiij/72956511442.pdfIn PDF document text
    • https://cdn.sqhk.co/japewaturu/gnHsqih/99263092469.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/WgigdAI/pekonudanonimowolez.pdfIn PDF document text
    • https://cdn.sqhk.co/besogevipadi/fkjcihO/best_free_horror_movie_apps.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/ghjeijb/neon_jumper_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/ejhVIgh/jojidugago.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/flS3Rm9/warrior_princess_road_to_temple_running_game_video.pdfIn PDF document text
    • https://xaminipa.weebly.com/uploads/1/3/1/0/131071220/3533457.pdfIn PDF document text
    • https://dodedogob.weebly.com/uploads/1/3/1/3/131382673/kofidum-vurija.pdfIn PDF document text
    • https://cdn.sqhk.co/vatukaso/foJUjiP/segirubosutetarotedoduwon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415046/normal_5fcf3e47a2073.pdfIn PDF document text
    • https://cdn.sqhk.co/ladetozuxi/kjjibgc/misuxuvoginaxubus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373992/normal_603f50a11ba39.pdfIn PDF document text
    • https://vatawasuri.weebly.com/uploads/1/3/3/9/133997312/somitebokaboz.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://uploads.strikinglycdn.com/files/696ba592-4b0c-446c-953b-cd2a83f4d851/how_to_replace_battery_in_a_firex_smoke_alarm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b08fd3-6403-4a71-b529-642759a73899/vodolawutijog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992a04c3-ae52-4d4a-993c-88a1acebfb29/ley_de_propiedad_horizontal_en_venezuela_vigente.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1590e48-b9ec-4ce1-87f6-cdd473dab7d9/maladusalowimutinivenabu.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED6D 6548 bytes
SHA-256: b27c7a011d1e25a8740c16753f32df49003034e6b6973e84691b1598814ca5e7
font_01_sfnt_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 5420 bytes
SHA-256: 04c1543b3057ba93c9b3052a5233e152c44ee33d8d664f095a1ac5c09f59bd2d
font_02_sfnt_off00011029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11029 10540 bytes
SHA-256: ed8b4f79d59ca76694a3177746529f8ac83a967e4e883189cd93bf2a04c32632
font_03_sfnt_off0001341d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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