Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc5682479eb4f3d1…

MALICIOUS

PDF

100.4 KB Created: 2021-03-07 21:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e19ce791d8d4ebd4584e883d736e20f4 SHA-1: 5de7ce375bb4636c9a2571b8412d39a446fd3b05 SHA-256: dc5682479eb4f3d1ed226bedc4be39880f3d2154e85e1751f85e83d79c3410e9
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The primary malicious URL identified is 'https://bologen.ru/strik?utm_term=ragnarok+mobile+mage+leveling+guide+solo', which is likely used for phishing or malware distribution. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', further supporting its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=ragnarok+mobile+mage+leveling+guide+solo PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4385202/normal_5fced99dc256b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_5fd7accd7c42a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5fdbcf7c73683.pdfIn PDF document text
    • http://silofabinewu.22web.org/2636290924.pdfIn PDF document text
    • https://sidopaxabu.weebly.com/uploads/1/3/1/3/131398246/bojoluxuk.pdfIn PDF document text
    • https://rusuligoxajikug.weebly.com/uploads/1/3/4/3/134399392/df50d.pdfIn PDF document text
    • http://peramen.22web.org/como_quitar_formato_de_fecha_en_celda_de_excel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381105/normal_602833964c1e3.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/tuxenipup/95257045187.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/dazilakawaximep.pdfIn PDF document text
    • http://wuluminibopa.rf.gd/tipos_de_sistema_operativo_para_computadora.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/yanni_nostalgia_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ade3a0-d391-4b26-a3e0-cb45fbc4ac24/99195430334.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/add_background_image_to_css_stylesheet.pdfIn PDF document text
    • http://mumamame.rf.gd/63399437974.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/buddy_system_in_schools.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc3c856-1542-47a9-8833-7895cb786b97/23539789185.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50373093-cdd2-448c-a2a6-120065d519a8/java_8_collection_api_changes.pdfIn PDF document text
    • http://tisilakifejil.rf.gd/vampire_diaries_season_8_episode_16_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2de4686-54f8-419c-8808-bef12250f585/how_to_lose_belly_fat_fast_at_home_workout.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ff432c-8937-4911-8434-94073fc5c81a/bosowajaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecd8ae33-7456-4a37-bc9f-360ee2398e72/skyrim_ps4_mods_not_showing_up.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_off00014981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14981 5416 bytes
SHA-256: ccf07e4cd5d22cee1e9a1018b290cf9072e77dc7baff930b9fe141a57ed06b3e
font_01_sfnt_off00015be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE4 12052 bytes
SHA-256: 2d3e4a695384fcfa75f8da3705227c618f84fc65cb67ffe4279d126cb055e526

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