Malicious PDF — malware analysis report

Static analysis result for SHA-256 66df4e6e61942129…

MALICIOUS

PDF

86.7 KB Created: 2021-03-12 21:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b6a8462aed450dfc481b9acae0c1314 SHA-1: 768d1caf47034bdcdce1cd3937b4489176697e06 SHA-256: 66df4e6e6194212958f6fe4ba69a859f96947b7bc171dddf18cc1f48d5c7c6d5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to malicious content, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/aws?utm_term=el+principito+libro+gratis+para+leer PDF link annotation
    • http://reduslim-ufficiale.website/76574560086ldsv8.pdfIn PDF document text
    • https://cdn.sqhk.co/xogedusov/2uP5qjh/games_to_play_with_cats_and_dogs.pdfIn PDF document text
    • https://cdn.sqhk.co/penutizufib/fhcHggq/48723612116.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/Niegjhi/lightroom_cc_apply_edits_to_multiple_photos.pdfIn PDF document text
    • http://usacreditreport.info/football_live_on_tv1iwp8.pdfIn PDF document text
    • http://world-wildshop.com/76888806636zpayp.pdfIn PDF document text
    • https://cdn.sqhk.co/savimatuv/iH4id3C/aaha_video_songs.pdfIn PDF document text
    • http://abzac.me/nedotemukodca0or.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/zonebon/update_android_lg_g2_d802.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/rozumirerenusir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f0bdc7b-49c7-4668-885f-36d3471719a7/photoshop_command_key_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/wekekavup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555d82ff-67cf-493b-bc35-e5484f7c6d37/how_to_reset_ranger_american_security_system.pdfIn PDF document text
    • https://42e65457-ec34-4553-8979-78b6e302f774.filesusr.com/ugd/f1976d_10abfcc714cc4825abaf400c16a0cb98.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03ed31d4-c483-417b-aefb-6f5331917a97/69644326380.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/create_list_adapter_android.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/michael_crichton_timeline_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/how_much_is_jimmy_pattison_worth.pdfIn PDF document text
    • https://91e55214-10ad-44cf-a10a-60a9392df58b.filesusr.com/ugd/e1c37d_8ee2cb6c425044ebbbf73dd546350e73.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/maytag_bravos_dryer_heating_element_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/21019819338.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_off0000f856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 5200 bytes
SHA-256: e3bf953809610b29ec0b4c981b6c18065dd85289d497bf0d02165bf0e83d257a
font_01_sfnt_off00010a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A13 11944 bytes
SHA-256: 08d6e96e1edced732892c4f40db2987a5dc4990ee3f2ff7243d3e75bc50afa81
font_02_sfnt_off00013147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13147 17452 bytes
SHA-256: e94ade3ceda5c25b255ae4c46dbae3dffd1144f70905dde0b299623428f4e4ed

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