Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ce74bc51104eec…

MALICIOUS

PDF

91.2 KB Created: 2021-03-04 18:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 731d489a92ae2651922fad90aa7a0862 SHA-1: 5941260bdca8cc3168130f8c30fb33f340ab21d7 SHA-256: 33ce74bc51104eeca362e9697c17823c5660b81e44c87715a26ea42128e7737f
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'Asian production mode'. No scripts were extracted, but the presence of external URIs and the ML classification strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=modo+de+produccion+asiatico+ejemplos PDF link annotation
    • https://jofukesor.weebly.com/uploads/1/3/3/9/133999831/rutaxadedekad-pojabutu-jotukosu.pdfIn PDF document text
    • https://xijofufakeziti.weebly.com/uploads/1/3/1/3/131380729/8439653.pdfIn PDF document text
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/47f31df404.pdfIn PDF document text
    • https://vadalafazewa.weebly.com/uploads/1/3/4/8/134897988/f65d2.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/3bdbc39e-2400-46a7-89eb-590609244aee/95328277004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c9b06c2-5488-40ff-a5a4-85de6a0b3220/ejercicios_de_lectoescritura_para_tercer_grado_de_primaria.pdfIn PDF document text
    • http://senesijosezetu.myartsonline.com/what_happens_in_after_we_fell.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/2020.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/milusi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f482ba6-70fe-42e7-a13a-57ce95108591/97474185553.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/4845327603.pdfIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_a072cb0d1e7a444986c0750aeb4e0f0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/95288917136.pdfIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_724fc6657a5547a5aef0bbbea30f5f10.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dfc698c-ec3d-4d1b-9bc0-e3d066fc31a4/the_game_of_life_online_free_play.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/panasonic_dect_6.0_plus_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/zolidadonibovifora.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23e5f6a5-4c99-4a1b-817e-2e5d7d1506c0/how_to_calculate_mean_on_ti_30x_iis.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/kupupaxegelum.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_d4de6be3dd7f4d1fb5721e371e42e7d5.pdf?index=trueIn PDF document text
    • http://kipejefanowisu.atwebpages.com/jaybird_x2_earbuds_replacement.pdfIn PDF document text
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_fed7225971b54620a1beb0d361c56863.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/4-square_antenna_with_elevated_radials.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DA 5300 bytes
SHA-256: 733403547871535c8dc57b47ff97a6f1f9f7cb499c05eacba038088231d201af
font_01_sfnt_off000136d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136D7 12136 bytes
SHA-256: e11cba6957071fe06bd87bfdc0a5ba47bbf475330f0d0691a90f0770b3c38bdb

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