Malicious PDF — malware analysis report

Static analysis result for SHA-256 a310b623afb5a230…

MALICIOUS

PDF

72.9 KB Created: 2021-04-08 00:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe47f0bbd0ccbc954e8d627934dba1ad SHA-1: e5a56b98d96f82319af78acffadba40708e6625d SHA-256: a310b623afb5a230777c148afc85bdcfe799bd430d8223b5f806bedd469d6571
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URL that points to a suspicious domain, likely for phishing purposes. The PDF structure itself is also flagged for duplicate object bodies, indicating potential obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/123?utm_term=film+3+alif+lam+mim+2
    • https://cdn-cms.f-static.net/uploads/4465941/normal_6043b52fe2153.pdf
    • http://terakusinuw.mypressonline.com/32305263458.pdf
    • http://pitikudefojeken.getenjoyment.net/zimoxinede.pdf
    • http://digovin.getenjoyment.net/2003_john_deere_gx345_for_sale.pdf
    • https://cdn-cms.f-static.net/uploads/4375891/normal_60495813a0025.pdf
    • https://cdn-cms.f-static.net/uploads/4366659/normal_60674620a9692.pdf
    • https://cdn.sqhk.co/vujenibolo/cFCm5hj/midozapikixotuxojavaj.pdf
    • http://nezatarofarix.getenjoyment.net/3959809473.pdf
    • https://cdn.sqhk.co/nukuzulu/vicTogd/portal_knights_duplication_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4418185/normal_600ff7d68f549.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/96c91a8c-56a3-4622-a1aa-a57ab1633a2e/95558085744.pdf
    • http://gixiluvigatekij.atwebpages.com/how_to_use_pressure_cooker_for_canning.pdf
    • https://uploads.strikinglycdn.com/files/3b664004-c1ac-498b-bd28-e25fae1862f7/modern_family_a_game_of_chicken_review.pdf
    • https://uploads.strikinglycdn.com/files/ffc34f78-7561-4316-b22c-e7eb6fa02165/segabakejikoduvuzod.pdf
    • https://uploads.strikinglycdn.com/files/c332461b-ca7d-4bb9-8d35-736a2604296b/lord_i_need_you_chris_tomlin_chords.pdf
    • https://uploads.strikinglycdn.com/files/2ff54041-cad5-4de4-b035-037b285c1c49/60717830919.pdf
    • https://uploads.strikinglycdn.com/files/b84f9522-c43a-424f-87db-689081facb1a/ccna_salary_in_dubai.pdf
    • http://tudugir.atwebpages.com/fusionner_des_entre_eux.pdf
    • https://uploads.strikinglycdn.com/files/cb9a60ed-1940-4e67-8f06-c4ce97cca403/wu_tang_clan_song_cream_lyrics.pdf
    • https://uploads.strikinglycdn.com/files/15015362-26bc-44fe-b190-bac1426d386e/54166879538.pdf
    • http://wudemexa.myartsonline.com/59325195468.pdf
    • http://gonegexunu.myartsonline.com/cantaloupe_island_real_book.pdf
    • https://uploads.strikinglycdn.com/files/4b93d2c4-11aa-4946-98c1-3acb6f26b1fc/somuxizumiwu.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_off0000e150.bin
d32f05052812a4a611864a021e8fde285e97aaadc5ea004bf4c29f8770852db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE150 4892 bytes
font_01_sfnt_off0000f1f3.bin
5c72a77515ec01ce7b3cf398ea0193d2400825428f5e8b5118326e45e2f25f23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F3 10620 bytes

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