Malicious PDF — malware analysis report

Static analysis result for SHA-256 545ecda6f7ff9065…

MALICIOUS

PDF

71.5 KB Created: 2021-03-09 13:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a221ad795d23680797a3d399839c32a3 SHA-1: 633b0f86bed5a9b3041f1587dfb44bf60ffd6fd3 SHA-256: 545ecda6f7ff906528f458ed0fb2a3796b624ee5bc6e036fdc69794e0a2f70e6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=animal+adaptations+worksheets+6th+grade+pdf PDF link annotation
    • http://datingdate.site/46597112942zkmji.pdfIn PDF document text
    • http://robertferrell.net/what_is_cleavage_in_developmental_biology5ns3m.pdfIn PDF document text
    • http://byt-upak.ru/55397328350a5ecq.pdfIn PDF document text
    • http://swiss-gear.shop/traumnovelle_englishn0ryt.pdfIn PDF document text
    • http://rawenspant.online/mijesorajitipunonog6732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/45385890409.pdfIn PDF document text
    • https://05491ccc-77c7-428b-9c25-74f2c6c50d4a.filesusr.com/ugd/d51d36_0d955c8f95bf438fbed7f3499240e13d.pdf?index=trueIn PDF document text
    • https://9579f988-9383-433c-acf3-5fff76e0c882.filesusr.com/ugd/191a6d_e539947d4aa840d4adb7a4142d6e4c39.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3123d40-a1ce-43e9-9acb-1e2fa33bb538/minnesota_drivers_license_numbers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e27e3aa-acc2-4677-b4f9-1a7db2b9a2b0/black_history_books_for_high_school_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbef06cf-3888-4a2e-adc4-057b84aedd68/cuantas_formas_de_ecuaciones_cuadraticas_hay.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/guluburojisavu.pdfIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_886681229efe4e24b5f270d5c97b48df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b5b878-926c-4f8c-ad7e-52b13dd43379/pioneer_fh-x720bt_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/asking_for_formal_letter.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_67270eb20a32466db727f6185c4c89a8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac4793a5-58cc-4037-b706-df99c5607adb/hp_laserjet_p2035_cartridge_price_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f96f9003-8a8c-4435-9ae6-884ee064e96e/46779850928.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_off0000da35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA35 5752 bytes
SHA-256: c08fe0fca2afd716d9cb78b69ffdcdf73cf494c8ba2e98642c5f03ab7a0a8035
font_01_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 10176 bytes
SHA-256: 8bf40ed0035315970c22fedc179e1642e803665cea85f495a12bd71f63f63982

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