Malicious PDF — malware analysis report

Static analysis result for SHA-256 db852d9230bc8b3d…

MALICIOUS

PDF

98.4 KB Created: 2021-04-06 05:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7449ee0e456dd1bf2e01984645b48fe4 SHA-1: baa117466fc327f5534d101b018e00ab3cd51193 SHA-256: db852d9230bc8b3dad9d21067c0360f5c157df082b0936a9db3c2b46297ad159
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an embedded URI pointing to 'vilenefex.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a malicious document designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://vilenefex.ru/123?utm_term=hp+beats+audio++windows+10
    • https://static.s123-cdn-static.com/uploads/4409256/normal_5ff0da3730003.pdf
    • http://airet.space/tech_newsletter_template_freerz7d0.pdf
    • https://static.s123-cdn-static.com/uploads/4453327/normal_5fdf8030aeb4b.pdf
    • http://wixosefimaba.scienceontheweb.net/17682306778.pdf
    • http://itactical.xyz/mevonar8qo4o.pdf
    • http://wulixiv.sportsontheweb.net/kupidawelap.pdf
    • https://cdn-cms.f-static.net/uploads/4407994/normal_600f44ce614dd.pdf
    • http://topplafond.xyz/arifureta_light_novel_epub_free_downloadmo04k.pdf
    • http://pavozuketogo.mygamesonline.org/37821397438.pdf
    • https://static.s123-cdn-static.com/uploads/4416143/normal_5fc87b2d45fed.pdf
    • http://vukufitu.mywebcommunity.org/essential_human_virology.pdf
    • http://copyrightprivacy.site/93799553924nnovc.pdf
    • https://cdn-cms.f-static.net/uploads/4391319/normal_602c362225b03.pdf
    • http://najisemure.medianewsonline.com/42720360337.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/13531db9-82df-4550-a927-5ca0d53ba9a4/10642534257.pdf
    • https://uploads.strikinglycdn.com/files/4b1e35f9-6bd5-4eb2-9fe4-6fdf71ac59ce/a_series_of_unfortunate_events_cast_season_2_duncan.pdf
    • https://uploads.strikinglycdn.com/files/4eb313a1-0207-4675-bfe7-42b0b3a3b37f/when_is_the_4th_season_of_a_series_of_unfortunate_events_coming_out.pdf
    • https://uploads.strikinglycdn.com/files/d12528f9-27dd-460e-812a-6df04407e966/nivujorasasaxal.pdf
    • https://uploads.strikinglycdn.com/files/9e88e1f1-0360-4753-a3c2-21138c62e9d3/die_kleine_raupe_nimmersatt_geschichte.pdf
    • https://uploads.strikinglycdn.com/files/1c24604a-b122-4116-91c3-b085cd7ab093/21462758537.pdf
    • https://uploads.strikinglycdn.com/files/a05801c7-f164-45dc-8719-4882e4114f87/rodogedixanebofozupa.pdf
    • https://uploads.strikinglycdn.com/files/9c14b2fa-d81b-4901-b89b-188f96a50b84/lopawisuvigubonilas.pdf
    • https://uploads.strikinglycdn.com/files/9cdd01f3-ee9b-413e-a6ab-1ef09bcb6c40/girl_scout_songs_from_the_60s.pdf
    • https://uploads.strikinglycdn.com/files/5e380810-1f0b-4c17-b0e0-87431ec2e35a/larewigaxub.pdf
    • https://uploads.strikinglycdn.com/files/1f961115-3dae-4fa0-8ad9-9515a93438e1/92288127629.pdf
    • https://uploads.strikinglycdn.com/files/23d6cd85-add3-47d4-a6c9-1efbbd4b4dd9/junie_b_jones_books_in_chronological_order.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f842.bin
9d1d76c9972ce71fec8cecc148cbd2cc943cba807b492571c97f58ad0d0ae9d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF842 27052 bytes
font_01_sfnt_off00014543.bin
19683836eae183c87eb8291428f08e6044a3c2ed776c8e86058f5cecce221e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14543 5212 bytes
font_02_sfnt_off00015720.bin
2321ead97ab2a3ee8d327dbb23be8a01c83d2a5d4f33f5d99acb6ca01bbeaeae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15720 10720 bytes

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