Malicious PDF — malware analysis report

Static analysis result for SHA-256 48f0e7f0a886eeca…

MALICIOUS

PDF

82.2 KB Created: 2021-03-21 07:35:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f4839b00a7f1036164f48fa190cd055 SHA-1: 973a2d070cef2e751cc0b51b4d462c27addb269b SHA-256: 48f0e7f0a886eeca0832d1691fa3d0cc80e0d352e4391bf2482e23e6f74a9f16
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xajibur.ru/strik?utm_term=a+raisin+in+the+sun+quotes+walter PDF link annotation
    • http://xidasetetobuge.scienceontheweb.net/acer_15_cb3_532_c47c_15.6_chromebook_specs.pdfIn PDF document text
    • http://joxitikoki.getenjoyment.net/tactics._developing._third_edition._listening_script._bak.pdfIn PDF document text
    • http://zumanidoxup.medianewsonline.com/w_bolton_mechatronics.pdfIn PDF document text
    • http://arenda-comp.space/396067033995hv28.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/supavogixupagigo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367299/normal_5ff81b11416e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385853/normal_5ff024e5e6f5f.pdfIn PDF document text
    • http://kimiter.medianewsonline.com/tudijizux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_60327f661853d.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/14715731013.pdfIn PDF document text
    • http://cethq.xyz/32644519505pwxam.pdfIn PDF document text
    • http://vajesafosedepur.mywebcommunity.org/myer_briggs_personality_types_definitions.pdfIn PDF document text
    • http://internet-babki.ru/is_canon_mp495_airprint_compatiblec6bpz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_601f0deeca199.pdfIn PDF document text
    • http://wbigs.space/chokher_bali_novel9t8zn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0ecef3a8-5193-4df1-8dcb-1b7dd0f2be2a.filesusr.com/ugd/e6092c_477ef56709af40c8b9f21592d95a3090.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/507ff2eb-2c29-4039-9c35-162e0a441eac/bose_sounddock_series_2_watts.pdfIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_a1e380e28c2448659b65f5a73e18fb63.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0f2ba3a-73af-412e-879e-38cc5166efd4/best_pmp_prep_book_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b9409d-027f-41d4-9548-3dd9dee1d1a2/14490910343.pdfIn PDF document text
    • http://sanugifop.atwebpages.com/social_justice_through_multilingual_education.pdfIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_53afb11c1157468a8f57e56a93c98001.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef5df04-23ad-4524-8a74-37c4b3d47ccb/how_to_use_a_blackjack_weapon.pdfIn PDF document text
    • http://kopolug.myartsonline.com/diario_de_una_motocicleta_pelicula_completa_espaol.pdfIn PDF document text
    • https://79e8b926-cc52-4cef-90ae-68e3990d752e.filesusr.com/ugd/694d5d_aeab43aa239e4719a7900dff98f929af.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6848d701-dcd5-490b-8be8-093228ccebee/is_twilight_midnight_sun_a_movie.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_82b7fd3d97154be3a8643a234d6c29ff.pdf?index=trueIn 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_off0001020f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020F 4980 bytes
SHA-256: 00e286741661c5f54dc99c64fa1dc1041a150237faaa27b93f07a7b603a55da7
font_01_sfnt_off00011309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11309 11384 bytes
SHA-256: 3da568d9b088387ec6f0bf2f48a5af975ea2542b3c2668a5b836f0effb07da8c