Malicious PDF — malware analysis report

Static analysis result for SHA-256 90415c4d6f755aea…

MALICIOUS

PDF

44.4 KB Created: 2020-11-07 04:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 011f676e9eb793bbf1d472441973697a SHA-1: 1466476c0918d9d3b134f4ed11cffbbe4c361f11 SHA-256: 90415c4d6f755aea3b5f2bda8ff2765b81a3f9cb27e53bec3603611d685b83d1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The document body, though obfuscated, contains text suggesting a lure related to legal documents, likely intended to trick users into clicking the malicious links. The presence of numerous external PDF links further supports a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?keyword=oci+affidavit+in+lieu+of+originals+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369302/normal_5f8e8eecacfe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_5f8ef91b113e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f86ffb65dd53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_5f9c21a8eba49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8928c318d5e.pdfIn PDF document text
    • https://www.in.ckgs.us/oci/index.shtml2In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/lean_to_shed_plans_free_12x24.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bca5529b-9125-4d86-9579-0e3015d9dab2/ralokawipububokojar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9e5d11-d135-4c58-8d87-012e1b708113/dafizizanojekolutado.pdfIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://dosutodusaje.files.wordpress.com/2020/11/tatitapuxazawigotat.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_off00006cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 5412 bytes
SHA-256: 34bf53991cd6a70d00d4ce9f8aae719c2b8c49619b1125d59cb1c3d97da00358
font_01_sfnt_off00007f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6C 11176 bytes
SHA-256: 62dd6e0934ee00c71aff768e559417cbb8e5bda0179b57620e9df8d58b0588fa

Open this report in the interactive analyzer, or submit your own file for analysis.