Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cbf8770c4f973b…

MALICIOUS

PDF

77.8 KB Created: 2021-06-05 03:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 6b5f2dd986db7d084e811149eea39412 SHA-1: d9e526d4359d4fe972236b7d6ed780f88b10b179 SHA-256: f7cbf8770c4f973b1ff45e632dc26080d06ef30c46bc9fb000d555935ccc0d85
196 Risk Score

Malware Insights

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

This PDF document contains a link farm and a lure related to hacking Wi-Fi, suggesting a phishing or social engineering attack. The presence of numerous external links, including one to 'nomylo.ru', indicates an attempt to redirect the user to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to download a second-stage payload.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nomylo.ru/pbw?utm_term=how+to+hack+wps+wifi+with+rooted+android PDF link annotation
    • https://vepiduworubul.weebly.com/uploads/1/3/4/7/134723348/feferuzodogadid.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/dee27781853.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/f4fcd300-5d4e-4d76-8ca9-22a9cc8cfca6/96162248555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/613c745f-c080-4cdd-a1c4-d417c55ca06d/tibetan_book_of_the_dead_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a7bfc1a-b4b6-453f-8b7c-1001803737c3/how_to_learn_cloudfishing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132cfe6d-91d7-4ff3-87e1-28bd3e434752/is_delonghi_a_good_brand_for_kettles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2358a823-65cc-4e76-ba9a-46767d4742f5/gejagofekoxajotemejev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4598bb8e-b1ba-48f6-b4bf-a85814663294/planar_handbook_dd_3.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b52977d-6773-4595-a7fa-de6a2decf6f2/nawapup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1800ddd6-5975-472c-98ea-46bc64f26287/who_is_a_database_administrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59e51e3b-fb5f-42b9-a924-63c5cedd7b7a/libro_caballo_de_troya_2_para_leer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a0fb1f-538a-4c69-aec4-8770f6fa8d8b/how_do_i_test_my_oven_temperature_sensor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad2e6ab-ad32-4ed8-9037-b43cfc4545ba/fodoratena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7d57241-c409-49dc-ae8c-482153658e90/how_much_does_100_army_disability_pay.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/f/serazakakitenevafatetuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c9bed0-2c2a-4776-8abf-cd4d6ea02382/does_warming_beer_ruin_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e4913e2-23a1-4def-bdae-c9a50ce5c9d7/42085329817.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1fd3f14-0511-4e1c-89d5-dbff9c9ff243/what_does_825_mean_on_jewelry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e31b5c-7064-487c-9c2f-494525aeb851/how_to_translate_to_chinese.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/f/how_much_royal_canin_puppy_food_do_i_feed_my_puppy.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_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 5328 bytes
SHA-256: c3f36a1b6c85aaad22f9ea65acbb30dd53a0bc1e7a9351761fee1af52866d50b
font_01_sfnt_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 13052 bytes
SHA-256: 518d5021a8f34b4bb6cc30b910f95633c996fd07b34503b9b1579edf78a4ef6f