Malicious PDF — malware analysis report

Static analysis result for SHA-256 0971237e654a0086…

MALICIOUS

PDF

75.2 KB Created: 2021-03-27 12:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 691a91f71bba0bf789353a02306ba554 SHA-1: e84344a4389b9ce65484758b5d504d5c78356789 SHA-256: 0971237e654a00868b48d5b3be494db76319fd8771aceaf05df5577c20b1f5cc
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 high maliciousness. The document contains a large number of external links, suggesting a link farm or phishing attempt, with one URL specifically mentioning 'award' and 'download'. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://druttle.ru/award?keyword=building+blockchain+projects+pdf+download+free PDF link annotation
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/tatobukedimazafim.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/vewus.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/nokexudujiwis_gotuxijudibulo_rawore_zezisuwinip.pdfIn PDF document text
    • http://waliduv.mypressonline.com/wukajuvejezoxev.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/a5ijar1/luke_combs_songs_new_album.pdfIn PDF document text
    • https://lekumoga.weebly.com/uploads/1/3/2/6/132683130/7289342.pdfIn PDF document text
    • https://pasadotofeb.weebly.com/uploads/1/3/1/4/131482919/175569.pdfIn PDF document text
    • https://gadonivoxe.weebly.com/uploads/1/3/5/3/135331758/5b46855ba30.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/pazaka.pdfIn PDF document text
    • https://jokinurelebuvet.weebly.com/uploads/1/3/1/8/131856462/bb711db3.pdfIn PDF document text
    • https://cdn.sqhk.co/juxefirapuf/hc7ick7/poblano_pepper_substitute.pdfIn PDF document text
    • https://cdn.sqhk.co/nazabimon/chjWgdB/audience_analysis_report_sample.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/tuxalowafokuvo/regents_biology_biochemistry_concept_map_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/a_student_handbook_for_writing_in_biology_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/784caf29-ded0-430e-a3c1-f442235b40e0/cheetah_tv_mount_directions.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/wagif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aaf6619-7e0a-4550-8b94-2f42bd6ef81b/1_11_4_pulgadas_a_milimetros.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/bagri_nagar_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/gordon_growth_model_excel_template.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_off0000e744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 5840 bytes
SHA-256: 342fde00435dbe46fdb7b84e9990c61af2fc35346b9d6d565f21b95d6d58fd3a
font_01_sfnt_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 10540 bytes
SHA-256: cfdfe8ebc8d2b2e88f4a6f4207c44f407c598d210912a856eee7ee1bd2582c6e

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