Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fbf0f172161b93c…

MALICIOUS

PDF

43.3 KB Created: 2020-10-31 17:47:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 25d5962695845c6078f40e84d203664d SHA-1: bda54354fd020d506285a3c4d3f35674c0901713 SHA-256: 3fbf0f172161b93c1c1ebb5150ae2e29166fa6398984062239faf1117a53dc6c
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 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://ttraff.me/123?keyword=positive+words+that+start+with+letter+r In PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/a088a01.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/xokori.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f91e0ec89c7b.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/fezenur/21535232065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a410cfa1-0c1b-4b47-9b53-81b9b4a1cf3a/40762865634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d48ff89-9ce8-4fac-87be-6d1672b796d0/gutejazujelekuvewuvijiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/manual_save_no_mans_sky.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/87040613740.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/fluke_1507_manual_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/rumazegusavire.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/tawegosebanajak.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_off00006c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2A 5068 bytes
SHA-256: e116b48de207764c1c89b4b2923e5b445d78edc7e05d92b4c5563d5a1d40b6c3
font_01_sfnt_off00007d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D75 10216 bytes
SHA-256: ef97e69ca3cf2a104dc74bd768931abc75f0b531ccc60fda04a7f45880a282e7