Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95a8e772751764e…

MALICIOUS

PDF

76.5 KB Created: 2021-03-04 12:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3efeb3976762ceb0d9deeaa85d4784ea SHA-1: d145bd7a759c58eefedd134b91d321538519eede SHA-256: b95a8e772751764e14e0665cc6081c46cb3f274da65c5906337cc392ca9df3ef
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing lure related to printer information. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for credential harvesting or other malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://nipisod.ru/123?utm_term=hp+officejet+pro+6830+e-all-in-one+printer+series
    • http://shoop-fg.ru/non_small_cell_lung_cancer_treatment_guidelinescgw9q.pdf
    • http://kunozoxutokusu.mygamesonline.org/97783422924.pdf
    • http://sawedes.mywebcommunity.org/tusedas.pdf
    • http://modezewop.mygamesonline.org/how_to_use_pimple_patch_cosrx.pdf
    • https://cdn.sqhk.co/vamosopon/cghw4jc/gegasatuxupulolo.pdf
    • https://cdn.sqhk.co/faroziwe/dhiddgf/32683445476.pdf
    • http://tejovotemikodes.getenjoyment.net/galuzunumapuruv.pdf
    • http://zeboxagekej.sportsontheweb.net/kioti_lk3054_repair_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bezutu/business_studies_class_11_book.pdf
    • https://s3.amazonaws.com/xefezesebusu/zirixudotorisagovukujor.pdf
    • https://s3.amazonaws.com/gupawupigawono/adobe_reader_gratis_2018.pdf
    • https://s3.amazonaws.com/pilazi/drawing_the_schematic_diagram_of_autotransformer_starter.pdf
    • https://s3.amazonaws.com/bulolimepol/tezimovixunikagalezegin.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_off0000ecc5.bin
ab12f859861ec3de0f3264fa9a11f1b1ded0fd1b9b20ab0295dffd9731c3f24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 5732 bytes
font_01_sfnt_off00010059.bin
072f7992bc372e0e0ceda152dbcce62cc5f9fa4e6feca567807828f0d1760a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 10712 bytes

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