Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a05625c4655489…

MALICIOUS

PDF

38.2 KB Created: 2020-10-06 20:43:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2db42d6fab3a000d82f5e257b0354e2b SHA-1: 649b4720f81cb3083ed6e5a28d8d5eabb5adcd27 SHA-256: 63a05625c46554895ebb169fda812116851759123830a963a0ed07c911a9ecb4
94 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, indicating an attempt to lure the user to a compromised site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded link suggest a common phishing or redirection tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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/strik?keyword=levels+of+organization+in+multicellular+organisms+worksheet In PDF document text
    • http://files.pirumanors.com/uploads/1/3/1/6/131637043/felow.pdfIn PDF document text
    • http://zopegiz.2big4words.org/uploads/1/3/0/8/130814411/99147705c.pdfIn PDF document text
    • http://vexowudu.tlfamilydetective.com/uploads/1/3/0/7/130739624/8689976.pdfIn PDF document text
    • http://files.publishedbywestview.com/uploads/1/3/0/8/130874509/6060171.pdfIn PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/vizugazirotanabovi.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/1a1bf24f-b7a8-4c9b-b29b-eb8a7b6eea17/wuraninutuzuxugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcb21834-476d-4378-9e9a-60b8f57b3ad7/30057760579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1c88e1e-d4fe-4875-86f8-73dca820f55f/19534195762.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53743f47-2b6e-42c4-a787-73dc7479ea6d/xusixuperujib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c5017b-1254-4bb8-8c4e-eea65339395c/taxakemumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0303/9903/files/melinefesezegunugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4683/6123/files/jigumemumegerakujibake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0919/0305/files/fizotoneguxuxanebawiko.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_off000056c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C2 5500 bytes
SHA-256: 9340a806cbd81a7c6f7a41626d03020587b5ea23900fba8dc057f340682575fa
font_01_sfnt_off00006973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6973 9928 bytes
SHA-256: 227cc0ade9473388ea6502f1eb37e946a2bdcc166badb62e3f01b0176cc2879c