Malicious PDF — malware analysis report

Static analysis result for SHA-256 704bc2b561198202…

MALICIOUS

PDF

85.4 KB Created: 2021-03-18 03:25:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15de1da5777397126bf8890418c58c23 SHA-1: 6ada18020b6ff433add2f27af1ffca6784c3cec4 SHA-256: 704bc2b561198202d94051b600e9cb5a7283b276a4fbc92a6e704cb11f052ab4
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it is part of a link farm or SEO manipulation scheme designed to drive traffic to potentially malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's primary purpose is to redirect users to other web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wix?keyword=beer+bottle+label+dimensions
    • https://memagakotis.weebly.com/uploads/1/3/4/7/134760483/kebeneworikufabobevu.pdf
    • https://nokaxogu.weebly.com/uploads/1/3/4/5/134520383/sutesufovuvaxoxulu.pdf
    • http://fosaralivenowom.iblogger.org/binejebifafewonipedifa.pdf
    • https://goresizusozal.weebly.com/uploads/1/3/4/5/134524816/4504623.pdf
    • http://samabev.iblogger.org/concord_oil_furnace_reviews.pdf
    • https://lezekuzog.weebly.com/uploads/1/3/1/3/131378913/miwafakivazig_gijiledudimi_fakedogogekimi_senebozavobo.pdf
    • https://radimedogotisig.weebly.com/uploads/1/3/0/9/130969281/7461804.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a8535ff-6dcb-47cf-aaef-4f772b8d42b8/elizabeth_clare_prophet_books_download.pdf
    • http://debukigezi.epizy.com/72093552349.pdf
    • https://a181bb3e-7445-4f1f-a1cf-b2fe66c13e92.filesusr.com/ugd/91ce54_b1276a86694747699f89af4e7446a687.pdf?index=true
    • https://e216d865-ddc7-438b-99b2-64609380b1bb.filesusr.com/ugd/7ae8b3_097e74d8aa4e4e50a5c00a1a13225bca.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a7cbdefb-8037-4088-8ed1-828f8b35c75f/30543172261.pdf
    • https://a161ff94-1a6f-4367-b6f8-8e513a5e676d.filesusr.com/ugd/4c7633_b694d57964ee451186a2501b3da66794.pdf?index=true
    • http://fepasike.epizy.com/xiribimos.pdf
    • https://uploads.strikinglycdn.com/files/f8202afe-9bfb-4a1b-b95d-a66d399835c6/nys_cdl_road_test_evaluation_form.pdf
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_0d5f7fd4a4674bafba2b047fe2d8fa63.pdf?index=true
    • https://f62823ea-e863-4eb7-bd7c-e3bac0139ff1.filesusr.com/ugd/8c639a_c715ed50d3674e15baafeffdb5002b5c.pdf?index=true
    • http://ralepixevoz.epizy.com/eduardo_galeano_las_venas_abiertas_de_latinoamerica.pdf
    • http://narivisifan.rf.gd/medafovewukune.pdf
    • https://uploads.strikinglycdn.com/files/be5b0c6d-43b3-4140-b5ae-97589c83bc5e/8869260401.pdf
    • https://uploads.strikinglycdn.com/files/8db6395b-e09e-4939-93af-508de169a72a/brookstone_sensor_clock_instructions.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001111d.bin
12a7a6bcb3d50426dbee123203b4a47fad92373b9e055af2a3efa76cc0528289		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1111D 5160 bytes
font_01_sfnt_off0001228c.bin
1f1dcab1c355325c2feacd1a34e2dd64b651ab0e4e09c31970f881d01ba9efd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1228C 11200 bytes

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