Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dbb934c343fc57a…

MALICIOUS

PDF

67.1 KB Created: 2021-03-08 13:17:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b1e6f1555d96676672d0f0f76422f132 SHA-1: a7b0d0ee1d3ca1a22c4f5003a1b7df9bb38c6591 SHA-256: 2dbb934c343fc57a6ac56f9d9d20640fadfbb2700f520033c6371f4b27b7860f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=achieve+ielts+2+pdf+free+download PDF link annotation
    • http://ganirutejiz.iblogger.org/nakaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_5fd80ce1eb5a1.pdfIn PDF document text
    • http://vesixadaw.22web.org/91993998829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5fe75aaf82127.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502336/normal_5fd9882917f20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463788/normal_601e03edca5a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417537/normal_603d1505f3ca4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_2e2d75e1763448819e8561c05a6acf7c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/95e184b3-4bbc-473f-a57b-85d7b3143e8b/burger_king_menu_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c8dfcdd-3612-4642-ba70-017dfe3ddfc7/yard_machine_snow_blower_5.5_hp_24_inch.pdfIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_30b299c0561245ab83a17c5ab187005d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28137085-410f-46c1-96d9-fb96e182b32d/49867329229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74475b20-a455-47c2-9257-1ca52b75d519/polejaxisiverifebedosapat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e14b261-3169-4cf6-a713-ea711020543e/how_to_turn_on_presonus_audiobox.pdfIn PDF document text
    • https://b01cffea-7a05-49e8-9781-04202a21c04b.filesusr.com/ugd/d5d855_5c2ab0b2dcdc4f9e8cb64357051dc653.pdf?index=trueIn PDF document text
    • http://wagesasalep.rf.gd/boot_camp_for_mac_os_x.pdfIn PDF document text
    • http://jiguxikawijax.rf.gd/8324759742.pdfIn PDF document text
    • http://xoginufosu.epizy.com/kuwilagugadejalaxe.pdfIn PDF document text
    • https://71f68c9c-1037-483c-a0ca-f268b7ddd3c8.filesusr.com/ugd/87fdc7_5d33805b6b074bd9a010a296b5667bc7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6964f807-a5ea-492c-9fd8-7de0f21dce35/who_is_the_tiger_on_masked_singer_season_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16ec5609-8f9a-4f00-ad91-1f4bbbe1ae58/19619727916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef9057c4-6dcf-4697-9d25-b59e6b90336b/how_much_do_computer_coders_make_an_hour.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA34 5516 bytes
SHA-256: f40ec97431c7ec64fc570c8b90c4be7c64a94f57b6edc79f4014e918deca1d40
font_01_sfnt_off0000dd10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD10 9812 bytes
SHA-256: 2c8b42b6f342abcd3dceef874204525d9a7790594bcea1b7a075213ea8a5da8b

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