Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab7e58ecbe165a1…

MALICIOUS

PDF

69.8 KB Created: 2021-03-15 04:57:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bdf4ca472a5e527c98eaf67db3bfdcd SHA-1: 24f083affcc03cbbe435108b66b8bf7c2e9b58ef SHA-256: 8ab7e58ecbe165a1fd3e890d031cfe04eb7166981b06fe5f6ce0b5297be4d152
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://jacksth.ru/wix?keyword=lover+eternal+pdf+download', which is likely a lure to download a further malicious payload. The document body is heavily obfuscated and does not provide clear textual content, but the presence of the external URI and the malicious verdict strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/wix?keyword=lover+eternal+pdf+download
    • https://cdn.sqhk.co/wemegofuk/xjehnih/electronic_components_sourcing_database.pdf
    • https://cdn.sqhk.co/noperizapewo/hc4XMif/r_type_2_arcade_rom.pdf
    • http://mignonette.space/connectives_worksheet_year_2k3j35.pdf
    • http://helplnstagramcontact5087423.com/game_android_offline_terpopuler_2020e3utn.pdf
    • https://cdn-cms.f-static.net/uploads/4421611/normal_5fe9d14f7307f.pdf
    • https://cdn.sqhk.co/jipodipotaj/ibROZjh/books_of_stone_age.pdf
    • https://cdn.sqhk.co/pulovafafita/cU7iifN/91360373154.pdf
    • https://static.s123-cdn-static.com/uploads/4445116/normal_5fe5525089cfe.pdf
    • https://cdn-cms.f-static.net/uploads/4460461/normal_600cc4af1b451.pdf
    • http://help-business-media.com/718565476815kxpa.pdf
    • https://cdn.sqhk.co/tusadopovet/gjdLeWM/lomugiwelaxeziz.pdf
    • https://cdn.sqhk.co/bexefoboxevi/ihBE8ji/90357392298.pdf
    • http://dkblogin-de.best/ny_drivers_manual_spanish95b77.pdf
    • http://idealica-official-it.website/ulysses_speech_troilus_and_cressidacy900.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/patotale/62669891687.pdf
    • https://uploads.strikinglycdn.com/files/ad6e4499-ba3c-4812-b1e2-de195635292c/2013_jeep_grand_cherokee_laredo_x_package.pdf
    • https://uploads.strikinglycdn.com/files/364000e8-89bb-451e-8b1f-7a1bd92fd0db/why_is_my_washing_machine_not_getting_power.pdf
    • https://s3.amazonaws.com/jotogorurekuro/xevuduzinosefufevaleme.pdf
    • https://uploads.strikinglycdn.com/files/77fa764e-b5f9-4af9-9352-5edabd893cb9/posie_libert_paul_eluard.pdf
    • https://s3.amazonaws.com/wizuluworafid/new_bhakti_photo.pdf
    • https://s3.amazonaws.com/jeduzizonox/86174210193.pdf
    • https://s3.amazonaws.com/mejawiwomak/delta_airlines_information_line.pdf
    • https://uploads.strikinglycdn.com/files/aca1c11f-23c4-4477-9788-8d67d31ba4e5/mivomire.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d435.bin
67a4bf7adce275257e536405b8dcf8ec8b05a146ba1e9996148d5df6c08f2d9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD435 4952 bytes
font_01_sfnt_off0000e53c.bin
62d4d97af68db40b1d43cdc0ab839bc23639f4edc410615c8f6dc6ffdacfa3bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE53C 10252 bytes

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