Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a7024eb00aeac5…

MALICIOUS

PDF

45.5 KB Created: 2020-10-01 09:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0fc3715c9eccf1992426132622ecb39d SHA-1: 99464c49534e58d855040ef842057582055b60c6 SHA-256: c9a7024eb00aeac514aff4af25a39bc6a4a5cca7aa75f49a640552d76dbf3257
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=adolix+split+and+merge+pdf+for+windows+10 In PDF document text
    • http://files.ranchosanmanuel.com/uploads/1/3/2/7/132741029/mepexarudare.pdfIn PDF document text
    • http://kasupis.biglakebaitboat.com/uploads/1/3/0/7/130740199/5232390.pdfIn PDF document text
    • http://files.pippaspilatesstretch.com/uploads/1/3/2/8/132814241/rebiwogafamujoba.pdfIn PDF document text
    • http://nilosali.dustinnowlin.com/uploads/1/3/0/9/130969186/8474537.pdfIn PDF document text
    • http://metigikiw.adventuresatyourdoorstep.com/uploads/1/3/0/7/130740572/9585232.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/poparalokuxogo.pdfIn PDF document text
    • https://site-1036785.mozfiles.com/files/1036785/60745696727.pdfIn PDF document text
    • http://bubelig.bettysmakingmusic.com/uploads/1/3/1/4/131405965/totexigad.pdfIn PDF document text
    • http://files.whitneylawrence.com/uploads/1/3/1/4/131453214/vinaras_punuzorafisu_gixinedilapawer_vowune.pdfIn PDF document text
    • http://files.jucierdos.com/uploads/1/3/0/8/130874614/pagolirosetano_poxeb_vemazo.pdfIn PDF document text
    • http://gidad.promisingpresence.com/uploads/1/3/2/7/132712115/ketex_gavov_gefipu_bopodit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fcfb521b-38dc-45aa-9b71-c63ed95d1649/zawizofisebutepiwilov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56288ab-f510-4a06-84ed-d2f277911729/namoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ef74c3-033c-424d-ad08-79ac4e3d795b/33369654494.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 5492 bytes
SHA-256: a473b3aecfa3e4e61759ecc03e087f2bd0bf2ce0c634c8612f58d609943b6e0f
font_01_sfnt_off000070c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C5 15780 bytes
SHA-256: 1fec141cd27bfd4912862bc888934355b2eb0fe59e589e77d8f1eda53e185202
font_02_sfnt_off00009a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5C 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230