Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc3bc2678c658a6…

MALICIOUS

PDF

56.8 KB Created: 2020-10-09 10:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4d541d607124cf3d8dacd47ee7a0ef39 SHA-1: 6755aa396e2c909b21691895d969367a2d2af1d8 SHA-256: fbc3bc2678c658a6a94b3942c35520850b54dcb7d5bfd3585861c6616b180b2b
124 Risk Score

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 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://gettraff.ru/strik?keyword=abnormal+psychology+17th+edition+pdf+free In PDF document text
    • https://site-1042011.mozfiles.com/files/1042011/61422556810.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/lotebunemusoxi.pdfIn PDF document text
    • https://site-1036691.mozfiles.com/files/1036691/83643344569.pdfIn PDF document text
    • http://soseniwe.lifetimeepoxyfloors.com/uploads/1/3/0/7/130776321/0fb88f3881.pdfIn PDF document text
    • http://files.chrislockett.com/uploads/1/3/1/4/131453818/3b4d17b1179d425.pdfIn PDF document text
    • http://files.amandamorgancounselling.com/uploads/1/3/0/8/130873804/a60fc.pdfIn PDF document text
    • https://site-1036829.mozfiles.com/files/1036829/51960191944.pdfIn PDF document text
    • https://site-1038492.mozfiles.com/files/1038492/kogexitixewasup.pdfIn PDF document text
    • https://site-1040032.mozfiles.com/files/1040032/zokuxinezemibiwi.pdfIn PDF document text
    • https://site-1038431.mozfiles.com/files/1038431/51713290307.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/besinosub.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/9d6068a9-dcda-4952-95bb-f9cbd892f2b6/96484630379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/679552c6-fdbe-4742-a95a-d82543c748a6/97616700166.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb8c6f0-889c-48c9-93c8-24eeabde9698/45574537107.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_off00009e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E45 5932 bytes
SHA-256: 6bc9ceed7d4c0d2c1330c8d3d27e4d0bc4392f28472c8280de79a273e4e62132
font_01_sfnt_off0000b25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB25B 10428 bytes
SHA-256: bd8a4e9af15ba206d920e3cf7ec1c697fbddcf549c4568acf3d1c7cd54aaaf77