Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e96b6df2007c45…

MALICIOUS

PDF

76.3 KB Created: 2021-03-05 19:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: f92010f6039d8b85186b3172a921ea65 SHA-1: 516a746771135fc1cb72828ccd05fe5785442258 SHA-256: d0e96b6df2007c45df41664731003b910d2cfe5a4c1dda6be4e38294a88113e2
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the primary goal is to redirect users to malicious or spam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/wix?keyword=onkyo+surround+sound+receiver PDF link annotation
    • http://jozipuvuwuzaj.mywebcommunity.org/how_to_turn_on_pelonis_fan_heater.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/629a942c-3238-480b-8802-fc2b48d9a0d7/mr._coffee_coffee_maker_5_cup_jwx3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89920101-6a7b-43e1-aa95-785ee03c14cc/how_to_charge_ps_vita_without_charger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f9f0372-915d-4507-b312-0631c00a02a6/braun_340s-4_replacement_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5a87b6-7f23-4cd0-be96-48ab336b517d/luvufuriwugamuvuxod.pdfIn PDF document text
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_77bf980c192f4fb5b841f5ad094f9d16.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/342b2ed4-0552-471b-ae99-a5c34fc0ba77/ganapathi_sahasranama_stotram_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e160ea22-cf8f-4df9-8591-c7cc086c66d8/zoom_505_ii_user_manual.pdfIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_9799751737e34d068dc81f9a89d38512.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b064eea8-a834-450a-a328-5ba2884f83b3/janekebagunajilizokumapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef39142a-a271-47c3-ad05-3f0e32859c3d/sharepoint_designer_2013_sp2_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e74f698e-9658-490d-9294-e3370bf55440/beth_james_volusia_county.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01335745-a92e-47ef-a481-e4f07ce17c92/zevebirunugi.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_524b2c64cbc1425cb0c196bb9544bb10.pdf?index=trueIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_afcbabcfdd7c4bb782a4c49686061ca0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52ccf58-f130-454e-8784-1f1e84f1b1f0/american_literature_textbook_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a82a26-3f53-49b3-b4d9-ba6961df444b/19479427946.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/mvcc_financial_aid_email.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50fbea24-5faa-4fc3-aaef-0c39fb51fadc/how_to_add_spectrum_app_to_apple_tv_3rd_generation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00e9f08-6c96-48d2-a75d-16457ebbd56a/pitolikivesokipijutife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1482760a-5e2f-451a-b41f-4163f71be695/92718078143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd913b31-25c4-4ead-bcfd-7d614097038f/how_to_reset_a_honeywell_water_heater_thermostat.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_off0000ed14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 4944 bytes
SHA-256: d0f6a5a4181afed4b06d6e46b993f289a9a1d955beaf0d9b95072ea575f6ba26
font_01_sfnt_off0000fe0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0A 11252 bytes
SHA-256: 4375f21c4b62a015389ff5282d1a876f4b1c68796a6b1c3b1f2b1668db083437