Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae1575f17a15bde…

MALICIOUS

PDF

68.6 KB Created: 2021-03-23 08:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b36c88de9e5aeb3a5f3670506db5a832 SHA-1: cf1798752a8166a6bff6e22b9ab881e452f9f619 SHA-256: 1ae1575f17a15bde50d2ab39cd0815de5f3190f86cc53eae94125c4fb8033c8c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF that contains embedded URLs pointing to potentially malicious domains, as indicated by the 'PDF_URI' and 'ML_NYX_PDF_MALICIOUS' heuristics. The ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'. The primary malicious URL identified is likely used to host or redirect to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/award?keyword=temporale+pr%25C3%25A4positionen+%25C3%25BCbungen+a1+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481072/normal_60592549e2157.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449193/normal_5ff6b3c3bf7e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450249/normal_600c8b6565a46.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwipabobatu/i5ghhhB/99576606688.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/free_printable_grammar_worksheets_for_5th_gradezxsn8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417818/normal_60430c303b646.pdfIn PDF document text
    • http://about-igsupport.com/51398508291lj4ti.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/hcgergi/wings_and_things_menu_hempstead.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/jhjihWq/lego_dimensions_simpsons_level_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1a6defe7-92a0-4357-8a70-d3bce85d30c9.filesusr.com/ugd/385065_73f73c324034463ea8cb2bc37685140f.pdf?index=trueIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_31fc775172f4427a80d82b4818876267.pdf?index=trueIn PDF document text
    • https://95c758d6-fd33-43c6-b5d0-f1f55e07e946.filesusr.com/ugd/cb0188_b89145554f9140969061c17cb0d5fad6.pdf?index=trueIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_f5fb79f7ca484d77b993f1b51133bba3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c8b4f6b-f88b-495d-a835-14057eaa0355/59252724946.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/jvc_kd-r860bt_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4095ca9-95ea-4041-93d8-8cd4b5e44920/sokirudikulivigilonogegus.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/momakudotifabola.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/coursera_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/latest_best_android_phones_under_20000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ba6fba-4f0d-457d-9cda-459cb8024bd6/27612990075.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_off0000c9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A0 5856 bytes
SHA-256: 45010fc4e2fc44d1f469721cd15b4d474ea12d2ab1a8d9bb2922c952e2511e90
font_01_sfnt_off0000dc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9D 11572 bytes
SHA-256: 66e7aef7c21fbe77a9ad94221d96f05bdd3d9d964d7a84fe15d8637b2e0dfcab

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