Malicious PDF — malware analysis report

Static analysis result for SHA-256 7806a29ad267b649…

MALICIOUS

PDF

62.5 KB Created: 2020-11-23 18:40:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: e70db23a872c95151efa999039946527 SHA-1: cd7e0224546aef1b940efb2356b77f9874f2954f SHA-256: 7806a29ad267b64947f31c50901dfb3f9faca1a4c370ab203fa5034233480b01
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/123?utm_term=mas+alla+del+sol+acordes+piano'. This URL is flagged as malicious, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV also strongly indicate maliciousness. While no scripts were extracted, the embedded URL is sufficient evidence of a malicious intent to redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffine.ru/123?utm_term=mas+alla+del+sol+acordes+piano In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375076/normal_5f8fa7125150e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423136/normal_5f9eb76f520cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407997/normal_5f9794e4422a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419637/normal_5f9c5f7140556.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/nimuwet/fundamental_of_electrical_and_electronic_engineering.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/green_tea_crystal_light.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/dabojumub.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/nisigideselugovozon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93be35e6-fd4a-4bd9-8b00-1436f7ed648d/67574069043.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/84495829685.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/online_file_converter_to_pptx.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/minecraft_tower_defense_final_game_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fac3e48-2a84-4968-835b-3c7270ed7ce2/rfactor_2_download_completo_crackeado.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/exercicios_analise_combinatoria_e_probabilidade.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_off0000b665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB665 5072 bytes
SHA-256: 8fade78da789e25adcb5eda664672a5a2e33f44efcfb4fa8428a71a3759fda00
font_01_sfnt_off0000c7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BB 11492 bytes
SHA-256: e65ab28f76aa3ce97914927bd718538358a6ae087a68e75d17f055e17c045b8a

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