Malicious PDF — malware analysis report

Static analysis result for SHA-256 e693272b71aa21bf…

MALICIOUS

PDF

145.7 KB Created: 2021-06-07 01:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0a46957eda9d7b68341473727a172820 SHA-1: c24a2036d5d57065822e8b40a363acced7511b22 SHA-256: e693272b71aa21bf423b113b9fa834549929d0ed52aa8bd9a1e1db4e6b771455
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 0.9924

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://fokemale.ru/123?utm_term=software+company+profile+examples+pdf PDF link annotation
    • https://gekonoxare.weebly.com/uploads/1/3/4/4/134480638/c9bb686.pdfIn PDF document text
    • https://zipatusuf.weebly.com/uploads/1/3/4/0/134012633/f68bfd026.pdfIn PDF document text
    • https://mujesazuf.weebly.com/uploads/1/3/2/3/132302915/5db863f24b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_604006dce8df7.pdfIn PDF document text
    • https://fofevupug.weebly.com/uploads/1/3/4/4/134490210/posamatusufumonotoxe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_6046ed0b1d2ef.pdfIn PDF document text
    • https://zopopalolidipe.weebly.com/uploads/1/3/4/5/134500843/zuzivudimogopefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5fd795a8258c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_6019a57c5a130.pdfIn PDF document text
    • https://wedovaxebekusos.weebly.com/uploads/1/3/4/6/134634127/tikasijos_jebirufuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487618/normal_5fcbd498e5a21.pdfIn PDF document text
    • https://niladomawinur.weebly.com/uploads/1/3/4/8/134875702/porer.pdfIn PDF document text
    • https://gogakasepasepun.weebly.com/uploads/1/3/4/3/134375341/vuvalomida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tereburokofe.pbworks.com/f/foundations_in_personal_finance_chapter_3_review_answers.pdfIn PDF document text
    • http://kimotamiju.pbworks.com/w/file/fetch/144615162/skydrive_cargo_drone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d595e37e-29e9-481f-9d8d-880c31fa0324/adjectives_to_describe_rainforest_animals.pdfIn PDF document text
    • http://jifesepapo.pbworks.com/w/file/fetch/144441534/wixokavowepadup.pdfIn PDF document text
    • http://rawumadakora.pbworks.com/w/file/fetch/144751737/adjustment_disorder_with_mixed_anxiety_and_depression_dsm_5.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/f/niwumevibelapelules.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/f/wongs_essentials_of_pediatric_nursing_test_bank_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e446e3ce-38d2-4f38-8ac1-2c9af7c12c81/traductor_ingles_espaol_gratis_online.pdfIn PDF document text
    • http://vixifalino.pbworks.com/f/78114637315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac472444-4a40-4866-97ac-b3ef551bd2ad/kolorixuvefalolitilip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7386104-0966-444c-9e5f-5f714683fd66/bituwivukerewajorede.pdfIn PDF document text
    • http://numefen.pbworks.com/f/7679138183.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/w/file/fetch/144665505/mirrors_edge_apk_android.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_off0001fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCCD 5668 bytes
SHA-256: 6ea7e8c507b35bc0494164b53dbae22a36cb5c9e5e8ecb41f05caa1689a4294d
font_01_sfnt_off00021025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21025 11784 bytes
SHA-256: ba7defe1b8ea6e0b02fcd62919a64a338cda1a630c91fabca5e585ca18210daa