Malicious PDF — malware analysis report

Static analysis result for SHA-256 998fc60e4e6da930…

MALICIOUS

PDF

51.1 KB Created: 2020-10-09 22:06:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 16316ce0c51071f99aaaa75a47ffa646 SHA-1: 735a944ea7f8826c2250363703684ff19d45b55a SHA-256: 998fc60e4e6da930e31b3294beeb7c0049deb8439c53a2001a5be943e3d5bd10
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://cctraff.ru/strik?keyword=miracle+question+script In PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/pusugapefeniwa.pdfIn PDF document text
    • https://site-1037205.mozfiles.com/files/1037205/dofipemoturokonaduvujif.pdfIn PDF document text
    • https://site-1048442.mozfiles.com/files/1048442/sotigunepasuv.pdfIn PDF document text
    • http://files.aminkabelvitt.com/uploads/1/3/1/3/131383549/af149356509.pdfIn PDF document text
    • http://bofiz.pdxbridgetours.com/uploads/1/3/0/8/130814328/tewuwitize-kafasoxitazanug.pdfIn PDF document text
    • http://files.sabinesteinmetz.com/uploads/1/3/0/7/130776489/8804837.pdfIn PDF document text
    • http://jakunuki.teamvanrens.com/uploads/1/3/1/1/131164066/ef67ecfd.pdfIn PDF document text
    • http://files.horseshoecafeandcatering.com/uploads/1/3/0/7/130775921/5700095.pdfIn PDF document text
    • http://files.leitchhealthybeef.com/uploads/1/3/1/6/131606396/4798306.pdfIn PDF document text
    • http://foduxil.undergroundstrong.com/uploads/1/3/1/4/131453565/7231493.pdfIn PDF document text
    • http://rudopo.wivert.co.uk/uploads/1/3/1/3/131380983/c2456.pdfIn PDF document text
    • http://files.bodyandsoulapothecary.com/uploads/1/3/0/7/130739444/6623711.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/6ebbc550-8e69-41a9-b488-6555178f3cd5/zitijaxasijaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7097b143-efcf-46b2-96c5-30d4c4b8b1c7/98340132638.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_off00008b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3E 5056 bytes
SHA-256: bdc53171a1ee71921c15c0ff659f55fa2ac118b11b43723f56cac384d24b713f
font_01_sfnt_off00009c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8D 10240 bytes
SHA-256: 93147991dbc2df3953fc49b8e39f7f8007d235558ec9ad0e3556225cff848b37