Malicious PDF — malware analysis report

Static analysis result for SHA-256 578c0e25c1892240…

MALICIOUS

PDF

76.3 KB Created: 2021-03-12 18:27:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1723950057b5acf0130b68f7c13b471a SHA-1: db59edf2fb3dbffa9ab4b1b65b7432ff95b0dd35 SHA-256: 578c0e25c18922404142d252691c9325b54950ca65ea78e247aa389ad93a3f3d
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 0.9956

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://soxebez.ru/wix?keyword=mpa+mpa+basketball+tournaments+2020 PDF link annotation
    • https://gevaboru.weebly.com/uploads/1/3/4/6/134685165/zigakekibebet-kawuseti-mokawatozom.pdfIn PDF document text
    • http://d-youtube.com/bharti_axa_life_insurance_application_form2dcb9.pdfIn PDF document text
    • http://anyita.space/organelos_membranosos3ir9e.pdfIn PDF document text
    • https://vuguzakinizole.weebly.com/uploads/1/3/4/4/134493236/1076666.pdfIn PDF document text
    • http://bitipusefotas.66ghz.com/tujititibib.pdfIn PDF document text
    • http://drovazvenigorod.ru/xerox_wc_7545_fuser_system_errortmvvn.pdfIn PDF document text
    • https://xoravali.weebly.com/uploads/1/3/0/7/130775395/rebimupesoluvatibixi.pdfIn PDF document text
    • http://slimerecipe.org/silent_hunter_3_resolution_fix_windows_10xzdjt.pdfIn PDF document text
    • https://gipenozup.weebly.com/uploads/1/3/1/0/131070487/5180684.pdfIn PDF document text
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/5698032.pdfIn PDF document text
    • http://bestgirl69.com/hunger_games_books_freewwi4o.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/ragejufa/anybody_can_dance_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/19267495827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44af7884-9e45-4972-804f-f49e5ccf608b/shatter_me_book_3.5.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/how_to_connect_universal_remote_to_tcl_roku_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50a2bd34-aeda-4d72-8763-f7a23443f485/91396499617.pdfIn PDF document text
    • http://reretez.rf.gd/linksys_6500_extender_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a480035b-9add-463e-88aa-f222e2a85e39/29384045269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7ece406-67e9-45d7-8d08-c734764e3d3c/nasm_essentials_of_corrective_exercise_training_second_edition.pdfIn PDF document text
    • http://bosirizowu.rf.gd/99727355397.pdfIn PDF document text
    • http://xuvotawelotito.epizy.com/41209589726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0aeea0eb-de0b-4371-90f6-2b19b49ccbf3/10129115236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fab8730-f9ac-484d-a1b7-b2f9418b63a6/jegivamulozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc48e8f-3d89-42db-8056-fc0601690d7b/how_to_repair_your_car_in_gta_5_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/10389496395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc8c6779-86d5-41ae-91de-9b31a6c2e959/how_to_configure_hikvision_dvr_nvr_ddns_remote_view_setup_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97a1de08-4f5b-415a-81e0-995c5e484e2a/55027433351.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_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 5448 bytes
SHA-256: 95af3be08c726ce25a4703282c7a5d549ff60b76fe2cd90a080b5c391a310dff
font_01_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 10312 bytes
SHA-256: 1e8ddf74c3867aa9b743703daffe22678ba7d986b4e4ffa7db416a7d54b9596c