Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2697e99c5abe75…

MALICIOUS

PDF

78.6 KB Created: 2021-06-02 15:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7e11202e01bb05a424d415d500d3d428 SHA-1: 45b79bba6524acd99be3dd573f14180e33a15d8e SHA-256: ca2697e99c5abe7531f0f13dcc466bf2a3d57f2a1fd6cf3f6bbf31e72c2bb5e5
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external links, with a primary URL pointing to a suspicious domain. The document's structure and content suggest it is designed to deceive users into visiting potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • 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://pistant.ru/pbw?utm_term=baixar+o+livro+nosso+lar+em+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466675/normal_602f1be69a563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5fd0af77ee437.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414339/normal_5ff35dab2b3e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_604f525c2ac15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_605bdfa079b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385614/normal_606c468bc76c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445334/normal_605139448d314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403565/normal_5ff77a48d8874.pdfIn PDF document text
    • https://rivewatot.weebly.com/uploads/1/3/3/9/133999312/werusawafugulidage.pdfIn PDF document text
    • https://nopubekekav.weebly.com/uploads/1/3/4/5/134511336/vigokisisexinikebaj.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/5f398ffa-4c87-4196-86f7-3b2966786c5a/mastering_python_for_data_science_github.pdfIn PDF document text
    • http://zikasamu.pbworks.com/f/dunifoviduwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5faa6299-eb49-4882-90ed-acbc4ae936b6/tadupepuwofemimavakixu.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/144447453/como_sacar_nmeros_de_oxidacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1cfef64-ef89-46b2-8040-2bebd5b964d5/xajumalexunofi.pdfIn PDF document text
    • http://nilanom.pbworks.com/f/pinemurogatogo.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144418386/goxugibejosil.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/f/fuveguw.pdfIn PDF document text
    • http://zufiwuz.pbworks.com/w/file/fetch/144457050/18213980756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d76d82-dd17-456f-bc92-ea365b5102fa/how_to_turn_on_a_sandisk_sansa_mp3_player.pdfIn PDF document text
    • http://gatasulupu.pbworks.com/w/file/fetch/144422292/69837674700.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06474c80-e746-4f46-9f18-a05026c940f5/husky_26_gallon_air_compressor_specs.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_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 5364 bytes
SHA-256: 5e14672735ec5e9d90ccb0057ac0a24b9d1660d912859f0c8701adcfeae32439
font_01_sfnt_off0000eed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED3 12632 bytes
SHA-256: 7e82bb0a122d458a99c84eeb56e9e68513e16b9835e6ce5bd73cd30d8b76812e
font_02_sfnt_off0001155e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1155E 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b