Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9e6926256715380…

MALICIOUS

PDF

75.6 KB Created: 2021-03-05 16:53:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: a913fd39ad399cc7c2a73cd86ef9b61f SHA-1: 863fc74fd527d4fe21972cd77e9088780a9b43f0 SHA-256: f9e692625671538062220e75632c3bffa8cee670eb0f3394ef677d4af8590f0c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://xajibur.ru/wix?keyword=zenith+zc400+remote+control+manual PDF link annotation
    • http://euroshopme.site/tajiravugopujavemcrfqe.pdfIn PDF document text
    • http://watercart.ru/185504593852brds.pdfIn PDF document text
    • http://new-leggins.site/42268191267bjda4.pdfIn PDF document text
    • http://dvertsoff.ru/speed_queen_error_code_e_tpnckp5.pdfIn PDF document text
    • http://study-english-05.site/dovixutozulesutgly0.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/tigewibejageju/broken_glass_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/fadimezatuvevevekawunetib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7db382bb-1c19-4980-b31b-6690f213df92/55045959212.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/association_of_former_students_twitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca269c3-6828-4209-86f3-29741385c0aa/how_to_reset_honda_maintenance_minder.pdfIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_bb9fb71720b74b7fb9232220054b2d27.pdf?index=trueIn PDF document text
    • https://8ab8d0a6-ebcf-4503-ac90-3c5d9a0926ce.filesusr.com/ugd/8585d4_e0d7b7e428074883b0f16ec316f9d830.pdf?index=trueIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_c6bbd16cf07a4664b9326b405d7d6f98.pdf?index=trueIn PDF document text
    • https://1b6fbac1-9b66-4609-9151-81f5d4c316f7.filesusr.com/ugd/5e81b9_c4cecc3148d944b79e05fe013f98d1ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ad9bcf-f0e3-42f9-83ac-d1acd3e2772a/euro_truck_simulator_2_1.25_2.5_crack_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/jamorumegapos.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/i_spy_book_pages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/663ad100-dfc2-45a1-bd12-8fb7706e83b7/construction_safety_supply_store_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc19412e-19f2-4208-8bbf-26128ea7caaa/elements_compounds_and_mixtures_1_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0faadf6-a355-46a0-a1ab-df179fbf16e3/sawutobedap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ec2e27-7b01-4d75-ad3f-80e1ce8d89c6/77464249331.pdfIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_a4f08bb91bb242c1b2492c0b453f0d07.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/76dce96d-b6b6-4a91-9ac1-670a18531b68/ruvibepuveralirusom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3950df2-217d-4eeb-ad03-e30be6688484/56761309082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbdd34b6-f3e1-4946-8cac-71a16facc68a/complete_list_of_alexa_commands_2018.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_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 5096 bytes
SHA-256: ae8a6aa54cdb343e0626318c63ee294528a72f999b79b6ff85c7307eac2073db
font_01_sfnt_off0000fde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 10196 bytes
SHA-256: 646f916ca911807ce610a33e45868514ea9d8399228735043944b66e55bbb188