Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa346a2d10a34e2a…

MALICIOUS

PDF

39.1 KB Created: 2020-10-11 16:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b4624cc94840abfa830f88ddc0a96d29 SHA-1: 76ebac3e1166f1656fb48042adc7545bb6db3422 SHA-256: aa346a2d10a34e2a614bcd0f48a5b64d250f45c81632ddfd53d2d69bdbaedd53
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://ggtraff.ru/pify?keyword=36+oz+powdered+sugar+to+cups In PDF document text
    • http://files.woodlawncountryclubfc.com/uploads/1/3/1/4/131407539/vosakazasixuz-futosexawejik.pdfIn PDF document text
    • http://moxaxe.mickonis.org/uploads/1/3/1/4/131438163/votapuxuw_refosed_vujolazegos_rotoxumiruk.pdfIn PDF document text
    • http://files.islanderdivers.com/uploads/1/3/1/0/131070972/zojewegopubepoxus.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/mizunanizu.pdfIn PDF document text
    • https://site-1041773.mozfiles.com/files/1041773/todemovop.pdfIn PDF document text
    • https://site-1037207.mozfiles.com/files/1037207/tamegonezebujewigipi.pdfIn PDF document text
    • http://files.geraldineklarenberg.com/uploads/1/3/2/7/132711936/tasuxosawo.pdfIn PDF document text
    • http://files.thewinnowmagazine.com/uploads/1/3/0/9/130969841/8196213.pdfIn PDF document text
    • http://zeraluluj.hipababy.com.au/uploads/1/3/1/6/131607203/wujowonak_lazosel_nipakuj_bebexuruguvo.pdfIn PDF document text
    • http://nonafe.killarabyod.com.au/uploads/1/3/1/3/131398140/16321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5879 5576 bytes
SHA-256: dc93930bd85ba4f577963ebf9868242ccd092a0fce66d12acbc2095e6bf836e1
font_01_sfnt_off00006b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8D 10744 bytes
SHA-256: b478f86cbd367fdb23bd55f2c030619e8a83703f3de6911a326f5756143e5919