Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f55bb86714e8738…

MALICIOUS

PDF

75.8 KB Created: 2021-04-08 05:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d47ba8895c63e6f507686f3cd12c30f2 SHA-1: 9021196c9ca25c1c42b31c417bed58e8f9cb63a5 SHA-256: 5f55bb86714e873813d2a0a39038fd543493725409040dd78ce016907d363973
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, disguised with a seemingly benign query parameter, likely leads to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitated the malicious URL embedding.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://jottigo.ru/strik?utm_term=jump+rope+workout+benefits PDF link annotation
    • https://cdn.sqhk.co/fusaduxuw/6jiazhd/dapolesupopizosi.pdfIn PDF document text
    • https://cdn.sqhk.co/puwipaneke/fzgfjcD/quads_superheroes_stunt_racing_games.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/is_he_dipole_dipole.pdfIn PDF document text
    • https://wudowured.weebly.com/uploads/1/3/0/8/130873715/lijajupumita-dokuxexoko-pavejekavi-fusuposewez.pdfIn PDF document text
    • http://fipagolanikobax.mygamesonline.org/ejercicios_para_aprender_a_leer_y_escribir_para_adultos.pdfIn PDF document text
    • http://ladujose.sportsontheweb.net/how_to_sleep_with_a_broken_leg.pdfIn PDF document text
    • https://siropenisawad.weebly.com/uploads/1/3/4/3/134353493/xufosuxotew.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/AHge5hi/30573388709.pdfIn PDF document text
    • https://cdn.sqhk.co/migukosodaza/mwHh0gh/scary_devil_ringtones_download_naa_songs.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/art_models_5_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wetevali/jisuduse.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/14937136320.pdfIn PDF document text
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_5bc2acacfaba442b9271dbc9a9e569e1.pdf?index=trueIn PDF document text
    • https://4db61c00-1078-4917-8a1c-a2c1480eb6e0.filesusr.com/ugd/c94206_b00bc9a8f16140dc8ba39472a49b1030.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cce1ac7-e412-4073-8ec5-e52d77bc22d1/best_excel_classes_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/bijomelewov.pdfIn PDF document text
    • https://ac263381-fdad-4fda-ae78-6df6d71032d6.filesusr.com/ugd/25c42e_c100934b7b2c4186a676b22c780b1255.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/xedifovulaxarelel.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_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 5092 bytes
SHA-256: 491454d76690cfb4393d9c307f776b4dd2507c9aef6953ec02dfa139a2f68144
font_01_sfnt_off0000fbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF7 10744 bytes
SHA-256: 72267c6234a011300bdd56bb573cc815b355dde555c01b7cd855bdb2b60e8887

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