Malicious PDF — malware analysis report

Static analysis result for SHA-256 d965f1ed7760230c…

MALICIOUS

PDF

79.0 KB Created: 2021-03-16 12:46:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3df6429719008ca5c839de72310a1ed SHA-1: b4b055db66ff242b94874a6664b94c5bfdcecfd7 SHA-256: d965f1ed7760230c6877268660ad3c1b5d636e748b9623a182e3bb46f66c9687
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The document contains a large number of external links, suggesting a link farm or redirection mechanism. One of the primary URLs points to a page that mimics a search result for a book, likely intended to deceive users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/award?keyword=allegory+of+the+cave+by+plato+pdf
    • http://xifelaseb.22web.org/ar_blue_clean_ar383.pdf
    • https://fapopadiwa.weebly.com/uploads/1/3/1/4/131438416/bb0d181b.pdf
    • https://sunudufexune.weebly.com/uploads/1/3/0/8/130874439/futaxigavibofo-wokesexizegoda-wufixogoguwabe.pdf
    • http://duxogesubuz.22web.org/reporte_buro_de_credito_empresas.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pexaniruvuwuwe.rf.gd/dinumunoripikox.pdf
    • https://uploads.strikinglycdn.com/files/74623447-6fd3-493e-9f77-2023983565be/how_to_figure_out_angles_of_a_rhombus.pdf
    • http://mevalegija.rf.gd/tipixovetajepabuvezu.pdf
    • https://uploads.strikinglycdn.com/files/ca3c81e1-8aed-415d-8f55-fa02472caf10/how_to_reset_yamaha_htr_6130.pdf
    • http://ridezajumoso.epizy.com/vibiromuxigut.pdf
    • https://s3.amazonaws.com/mosezavor/soda_water_nutrition_information.pdf
    • http://wawupipazuxalu.epizy.com/97963035678.pdf
    • http://jonulixax.epizy.com/degilatizatuxatalaramur.pdf
    • https://uploads.strikinglycdn.com/files/a5f72e5a-ef6e-4de2-a263-399dd6edf0b2/93380683839.pdf
    • https://uploads.strikinglycdn.com/files/e7b39093-8afb-4b89-8c22-061968850c4c/gugened.pdf
    • https://s3.amazonaws.com/jedadokuti/wordpress_login_page_custom_logo_not_showing.pdf
    • http://zevofelajasuz.epizy.com/megazegesobikot.pdf
    • https://uploads.strikinglycdn.com/files/2be61f2f-cc43-4d7b-9803-1f92a70ac779/20089152653.pdf
    • https://uploads.strikinglycdn.com/files/753a89f7-3715-4b7e-875a-2f620c6a50e4/ruger_sr22_review_hickok45.pdf
    • https://uploads.strikinglycdn.com/files/21e8d79e-017e-40cb-a766-cc23dd498ab3/walgreen_digital_thermometer_instructions.pdf
    • https://uploads.strikinglycdn.com/files/c2408e75-907e-4e5f-9206-00a0d12a367a/biology_book_chapter_2_the_chemistry_of_life.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_off0000f82a.bin
d233d1281e77ef3be7cc68ddd28a80732efcc50a494e049c9a67c263837d9486		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 5532 bytes
font_01_sfnt_off00010b02.bin
41732253628aa17af310d3b0b67f8934a8131fd389da749cadc96df5e99113e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B02 10464 bytes

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