Malicious PDF — malware analysis report

Static analysis result for SHA-256 262c20ab586ba3dd…

MALICIOUS

PDF

86.5 KB Created: 2021-03-19 06:10:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4081dc86da0afd6e37d6f4d7c99d47b3 SHA-1: 59badc330deea7b79de1ab143aea6505e32dcce7 SHA-256: 262c20ab586ba3dd0a20a95d76ee7cf5e72e5a4c95e17333abf58841ddfbfc23
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a significant heuristic identifying it as a link farm. One of the primary URLs, 'https://ponafet.ru/strik?utm_term=advanced+excel+course+fees+in+pune', is associated with a phishing lure, while another, 'http://jujageritoxo.atwebpages.com/barcelona_metro_map_download.pdf', is part of a mass external link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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.
  • 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://ponafet.ru/strik?utm_term=advanced+excel+course+fees+in+pune PDF link annotation
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/nuranigu_zamij.pdfIn PDF document text
    • http://jorowijedo.mywebcommunity.org/what_does_arrested_development_mean_in_biology.pdfIn PDF document text
    • https://baduzasozem.weebly.com/uploads/1/3/1/4/131407439/4e2976.pdfIn PDF document text
    • http://pedumerik.sportsontheweb.net/how_to_empty_dyson_dc59.pdfIn PDF document text
    • https://gulapekojikag.weebly.com/uploads/1/3/2/7/132741551/662176.pdfIn PDF document text
    • http://kolagozisil.mywebcommunity.org/26497592447.pdfIn PDF document text
    • https://loseseseveru.weebly.com/uploads/1/3/0/8/130813975/73966.pdfIn PDF document text
    • http://gimatadokij.mygamesonline.org/91959535326.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/what_is_the_purpose_of_pandoras_box.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujageritoxo.atwebpages.com/barcelona_metro_map_download.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/pitapobatika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8985a26-3e58-4255-942a-0695068dde30/oogway_ascends_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pidufozu/mai_teri_chunariya_lehrayi_dj.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/22185824810.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/77980523342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/287fafb4-7b78-47e7-abc8-f3a9fafb7aed/39147974189.pdfIn PDF document text
    • http://saboveliga.myartsonline.com/zibewusenoserokoriduwakoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495885f1-cedf-4102-b7a1-9704746bae51/how_to_reset_my_eon_smart_meter.pdfIn PDF document text
    • http://vegubom.atwebpages.com/stepper_motor_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7323d24-3fec-407b-8fe1-225fd9ddec40/70173576147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2de7639-c2b0-4bc6-abb6-4ceb3b0282aa/how_to_program_garage_door_opener_legacy_850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff3d73c-c14e-46ae-bda0-cdac844aa785/what_is_a_single_piece_of_coiled_dna_known_as.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/21335611639.pdfIn PDF document text
    • http://zorikeroz.onlinewebshop.net/is_there_a_ps2_emulator_for_psp.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 5268 bytes
SHA-256: c60437a7174887277d0d880ecf3c2b4e31ecb3c354838a030b8f26741e1de80b
font_01_sfnt_off00010fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD4 11332 bytes
SHA-256: 422f6d6e3960f8bf8da1e859568a63e97253bf1af008a6d264595a611eb213a0
font_02_sfnt_off00013696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13696 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6