Malicious PDF — malware analysis report

Static analysis result for SHA-256 c431974525e41dff…

MALICIOUS

PDF

45.1 KB Created: 2020-10-25 21:19:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 4c89a6b281bf9c4a994d109b89ca927a SHA-1: 638ef3e3194aaa82f3eddb07f0af8078b737837c SHA-256: c431974525e41dfffa47b007ee4e23283e115b8671d160ae08c142606b2f0d39
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/aws?keyword=jrf+agronomy+book+pdf In PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/xitukil.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nojof.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/vinirofevikuni_gonebirorox_degutatabij_jerisitab.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/delelides_dasexurekiwar_jajumab.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/jevaret.pdfIn PDF document text
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/gatazezizujebap.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/3277741.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/7955909.pdfIn PDF document text
    • https://senapuvuv.weebly.com/uploads/1/3/4/4/134459053/vibenakik.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/1735007.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006da3.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006da3.bin)
    • https://uploads.strikinglycdn.com/files/4da664a4-e129-4acf-97b9-54efccebfd92/41069896284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/934b49d9-eb42-4ca7-b36e-f5c049d7ec15/53610412093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb33fda6-6dd1-4090-aa3e-403e43fec938/silutedowoxewes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94a1173-ddbc-448b-8aa8-adec00e4a7d8/46956018807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0613/8787/files/download_game_mod_apk_ghost_battle_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/2873/0015/files/64356453866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1731/2152/files/26900354423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9413/0085/files/weather_in_puerto_vallarta_in_february.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/88937134227.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/abby_transformer_3._0_pro.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/55151798573.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/49236586662.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 extracted file (font_00_sfnt_off00006da3.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006da3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA3 5448 bytes
SHA-256: e2ef28b60af67a40e6e92bf235c1e4742a6b812cfb67bbc529020f361ca58381
font_01_sfnt_off00008018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8018 10836 bytes
SHA-256: c1608b390ef5763c2f742c90366f3fb1be95c8e16d52316a4f1d8dca2a0998a2