Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa1fe7c5eec9372c…

MALICIOUS

PDF

68.2 KB Created: 2020-11-22 12:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9571507b5618554b6f518b024201a633 SHA-1: d586b121a7f45543dcfe520e61457b71e8f90321 SHA-256: aa1fe7c5eec9372c20c640adfc0596fa990a41c5d2d398f9e3076b11dd20afe3
154 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is the primary indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=pink+4+wheeler+ride+on In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f92ae63c3d94.pdfIn PDF document text
    • https://kaperimivegorew.weebly.com/uploads/1/3/4/3/134371305/poraven.pdfIn PDF document text
    • https://merebidoso.weebly.com/uploads/1/3/4/3/134344951/gapufugatesifoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_5fb9f27f188c3.pdfIn PDF document text
    • https://lexixare.weebly.com/uploads/1/3/4/3/134354354/9577009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461786/normal_5fac581ecb636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f9d3d65d8ae5.pdfIn PDF document text
    • https://\//images-na.ssl-images-amazon.com\/\/I\/71HTRDM9BXL.jpg,created_ts:2018-11-09In PDF document text
    • https:///\/images-na.ssl-images-amazon.com\/images\/I\/71HTRDM9BXL.jpg,https://\/\/images-naIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wemupajese/xosaxowejivolinilijevaref.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/android_device_manager_change_lock_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/dotujifet.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/24618501622.pdfIn PDF document text
    • https://s3.amazonaws.com/wifozuxeku/91062964207.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000befd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFD 4480 bytes
SHA-256: aa32558beeb08e4bbfab0cad32c491ce5bd01c89ca282355d9dd8704de8419c7
font_01_sfnt_off0000ce22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE22 11376 bytes
SHA-256: d6f8b91a2c57907362704a0d81b0e0e2c64a5a784a7d18832285fa3c47f2902a
font_02_sfnt_off0000f4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D0 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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