Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3769d3ffc544eeb…

MALICIOUS

PDF

86.0 KB Created: 2021-04-27 23:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d334730a011bab0fb84f0ab6506aa2c SHA-1: 20b6e1b31f7af9cdf7f6d946c7372b0525cdbeb5 SHA-256: e3769d3ffc544eeb30a87f67d869597f8798b2e527467e98ce1a8a602465a42b
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'simple wooden rubber band gun plans' and embeds a URL pointing to 'nipisod.ru'. This URL is likely used to host a malicious payload or redirect the user to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=simple+wooden+rubber+band+gun+plans
    • https://cdn.sqhk.co/wapogade/60hnidd/58812833874.pdf
    • https://cdn.sqhk.co/nunexijezep/8KZ7Gic/real_followers_instagram_malaysia.pdf
    • https://cdn.sqhk.co/tufuboloruj/bgdVjeN/17739811487.pdf
    • http://sigixez.22web.org/biogas_evs_project.pdf
    • https://cdn.sqhk.co/kojogitu/nWYL9if/44522459474.pdf
    • https://cdn.sqhk.co/dodagirojep/gUghohb/entrepreneurial_mindset_definition.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6af62656-4ecb-4158-b274-b1ca9fcb32e6/48361291264.pdf
    • https://s3.amazonaws.com/zidenigad/photoshop_cs6_classroom_in_a_book.pdf
    • https://s3.amazonaws.com/ginutu/manual_citroen_zx_1998.pdf
    • https://s3.amazonaws.com/bulujono/principle_centered_leadership_stephen_covey_free_download.pdf
    • http://gowobubovojot.epizy.com/supply_chain_management_notes_download.pdf
    • http://biragexakulutaj.rf.gd/rational_algebraic_expressions_grade_8.pdf
    • https://s3.amazonaws.com/loranoduzuja/shetland_islands_travel_guide.pdf
    • http://lanutovomet.epizy.com/rewesenenuje.pdf
    • https://uploads.strikinglycdn.com/files/9bd5d21f-a00e-4ac9-b20a-0312e116dc31/zadujazunufufevug.pdf
    • https://s3.amazonaws.com/dowadotiju/pivakosubizegov.pdf
    • https://s3.amazonaws.com/zaxuledo/hot_and_cold_worksheet.pdf
    • https://s3.amazonaws.com/nitidadufetenu/5258019340.pdf
    • https://uploads.strikinglycdn.com/files/c48742cf-4be6-496a-bb9d-2bae5846570a/runumuwitivabafotetanoko.pdf
    • http://junedujivoxoz.epizy.com/oracle_12c_client_software_download_for_windows.pdf
    • https://s3.amazonaws.com/zemunomipazikez/lunipolodafizituloresig.pdf
    • https://uploads.strikinglycdn.com/files/b95f81aa-1fd6-49f3-9574-83e48b01cf8e/chick_fil_a_nutrition_southwest_salad.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_off0001107f.bin
f23d73c112a0c56ff50c91c5d7b6b809f6418728e68c67fea39230c3bd408f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1107F 5616 bytes
font_01_sfnt_off0001237d.bin
1619dae0136b101ecccc3e8784c1acbf799b034fa5485d9fccc056b012bac37e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1237D 11476 bytes