Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f902328cb93b95…

MALICIOUS

PDF

77.5 KB Created: 2021-01-04 21:49:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b0cf18b65806d7a6182373d279d70f06 SHA-1: 074d694266a5573bae5e4f6820c2c25b9c26ff53 SHA-256: 50f902328cb93b95da6cd74dbf09a7f085d08fc6c5e7f92d99792238323c2409
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/aws?utm_term=nissan+odometer+statement+pdf In PDF document text
    • https://nitogumijuta.weebly.com/uploads/1/3/4/8/134876923/duzetitipop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407807/normal_5fdd4a367db50.pdfIn PDF document text
    • https://zekedijudanafow.weebly.com/uploads/1/3/0/8/130874467/2960875.pdfIn PDF document text
    • https://cdn.sqhk.co/wefopijupe/geiaFid/50361834761.pdfIn PDF document text
    • https://cdn.sqhk.co/mofisozulud/YtHekTJ/90754884432.pdfIn PDF document text
    • https://dudabiwik.weebly.com/uploads/1/3/4/3/134354119/ea765b589.pdfIn PDF document text
    • https://dajexuxeguse.weebly.com/uploads/1/3/4/8/134859846/9ff3cce5a0fca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481402/normal_5ff32bd6d5d76.pdfIn PDF document text
    • https://cdn.sqhk.co/faxiwapa/fjfhigj/pebiweluboni.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5fe706e5eeabd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404953/normal_5fe0fb7f9897e.pdfIn 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
    • 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_off0000e5c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C5 4912 bytes
SHA-256: aba6c4878d1e20a0ca384007e332136e42b97fbf3bd030a56d147dabb2b45240
font_01_sfnt_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 10780 bytes
SHA-256: 501b0acd842446731d65f3e95be38d9471b142a830c97be897339062611259c9
font_02_sfnt_off00011b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333