Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d258b25b1237afe…

MALICIOUS

PDF

45.9 KB Created: 2020-10-02 11:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: be50fd7a44bf8b18925af47c4311b68f SHA-1: ad70dc55ad3137df3ccddecb3fb855b18bffa719 SHA-256: 6d258b25b1237afe7626583231871d47d72a78519515901448f36c19cb3dec82
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=furosemide+side+nursing+implications In PDF document text
    • http://files.dplusworldwide.com/uploads/1/3/0/7/130776423/fuzivipufugefir.pdfIn PDF document text
    • http://files.pmeshelleygreenwood.com/uploads/1/3/1/8/131856166/dodedot_dojem_kewetejuzonaxoz_luvogegoto.pdfIn PDF document text
    • http://files.henestrosastudio.com/uploads/1/3/2/7/132740249/gimudonojusadaw.pdfIn PDF document text
    • http://files.racheljeffery.com/uploads/1/3/1/3/131383719/zeketibinavivod-zotiboxuku-pugivalowolutu-memakusewuba.pdfIn PDF document text
    • http://files.pascalmarty.com/uploads/1/3/2/3/132303035/wededodabi.pdfIn PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/tumajorat.pdfIn PDF document text
    • https://site-1036694.mozfiles.com/files/1036694/jebefinedepesipijip.pdfIn PDF document text
    • https://site-1041690.mozfiles.com/files/1041690/bafetabenepadinub.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/134a1605-0ea9-43a5-bb64-c2d9d9b3c660/68968953081.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8999d84-c7c2-434c-ade4-9fbeb5f2e95c/20247413724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8777db9-6508-4bb4-9f6b-44a95ae7a080/90959760589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83fd224c-a5be-4090-86b4-b6c5aef6ddca/davozep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad3fe3f-877d-4f60-ad3a-981da5496a3f/55681579160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194917fd-3c1d-4635-a8d7-6af31ec84048/77104959236.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_off000074ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AC 5348 bytes
SHA-256: fe18a4d287d5b9a3beddfaf003241f667c855f388289d49abe2ad49d3fe1ad9e
font_01_sfnt_off000086c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86C4 10576 bytes
SHA-256: acc98fc0a74b0f4ac3878f87b49e994b6466425da44a287b91b8aeb9d44a42e5

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