Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcabb38270485680…

MALICIOUS

PDF

67.1 KB Created: 2020-12-17 11:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1e48464dead9670b6c3c0ad361a6b99f SHA-1: 35641a289769ea02d8a62f82bf27e95d998fae14 SHA-256: dcabb3827048568020e309cf4b3ccbcfcecc765420f5eea800289d7605c11de3
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded links to known malicious redirector infrastructure and a link farm, indicating an attempt to lead users to harmful sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://cctraff.ru/strik?utm_term=graphic+organizer+for+article+summary In PDF document text
    • https://lujogisuz.weebly.com/uploads/1/3/4/9/134904514/firujeseja.pdfIn PDF document text
    • https://rigivopamakor.weebly.com/uploads/1/3/4/8/134869382/buxanolanobadesuba.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/36151aa9-0973-474d-8f0c-4d152c82cf8f/kapuguzixobetatukavurag.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/89348078243.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc123f2e2fce462bc8d6747/t/5fcb7125a51c5a1401a9c494/1607168295660/lunegokefopuvukube.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/bodmas_worksheet_ks2_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/vertex_and_point_to_vertex_form_calculator.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfcaad334513fae422692/1606220970746/32177935855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897018d8-3580-4331-b0f9-b28246658f58/servo_i_ventilator_modes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4e657be9b693951246ba3/t/5fce087f260a660a6b00d432/1607338111799/squishy_definition_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a204d681-0bd1-4165-9f85-b2e984160a2f/29871809205.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ea21c30a162e0c52977d/t/5fc16c16173fb5383bd83b14/1606511639182/az_screen_recorder_pro_apk_cracked_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5112e12facd59cec7c30d/t/5fc5566b6457125654ed9880/1606768236556/error_analysis_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd20ff352d7073061f516b/1606230271981/galaxy_s4_zoom_xda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f5245d3-1ff3-4694-bcfb-54107ea57192/paypal_money_hack_apk.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_off0000cadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 5612 bytes
SHA-256: 99c4d77bb467630639b0ea0052167a0cf96aebabf578d5eda3c852c984a9a0de
font_01_sfnt_off0000dde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE6 9728 bytes
SHA-256: 948536fdc7ef98d2626fba21780d2edbff965fac1389abfada75ca3bf83f19fe

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