Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d442148c3bcb90b…

MALICIOUS

PDF

88.2 KB Created: 2021-04-09 16:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 05724417c00428a4bcb023815045a07d SHA-1: df31afbc4819a73e97812eb2319e7fdd450273b4 SHA-256: 6d442148c3bcb90b7a2b7b5898ff1030118fca1ce226d0a428d7eb11b611c24c
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://seumenha.ru/strik?utm_term=el+destino+manifiesto+definicion PDF link annotation
    • https://cdn.sqhk.co/woteruzid/BPcjjja/manchester_university_sustainable_development_goals.pdfIn PDF document text
    • http://fujepopini.22web.org/57929111435.pdfIn PDF document text
    • https://cdn.sqhk.co/mipemoku/haoTijR/consumer_reports_used_cars_to_avoid.pdfIn PDF document text
    • http://dutakevekuw.iblogger.org/mas_outsourcing_guidelines_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/jhcLieF/lidoxelaxepunepiw.pdfIn PDF document text
    • http://sufewonu.iblogger.org/plantronics_backbeat_go_410_wireless_active_noise_cancelling_earbuds.pdfIn PDF document text
    • https://cdn.sqhk.co/gujadozede/Elzjbjf/islanders_vs_lightning_2020_playoffs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484359/normal_5feafb41a2100.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374185/normal_5fc7974e213c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501057/normal_600da3fc03c92.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
    • http://nofalowi.rf.gd/41999251975.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/38735729687.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/mobosoxozusenewomos.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/book_meditations_marcus_aurelius.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/99623938380.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/captain_underpants_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3179a42-af0a-4b51-85a4-abf246e9133e/how_much_does_it_cost_to_run_a_30000_btu_natural_gas_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfcc0524-cda7-46f3-b647-0f70059ebf28/hp_officejet_pro_8600_plus_clean_print_heads.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/93074382046.pdfIn PDF document text
    • http://zefexulipovi.rf.gd/zunijasogawidigagipizisug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6da42e1-3670-47ab-8a0f-6e84fdb8b083/pajosojofizudega.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_off00010b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B26 4816 bytes
SHA-256: 7627f766b1cb7114a02f0f372a4363ab405618326901122a7c1a61b93f25dea1
font_01_sfnt_off00011b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6F 12408 bytes
SHA-256: 870b8b293b804619f47fd7944e68c0dc6838f416e6c6799a5f3c8cf9e0dcb105
font_02_sfnt_off000143d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143D7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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