Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61a04c51590037e…

MALICIOUS

PDF

61.2 KB Created: 2020-10-11 17:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 64d9126f8b990e0c28fd09dd5c2e6160 SHA-1: e9966b2a776b9708f0f259c76ad8207abb0f1dee SHA-256: f61a04c51590037e762a40814147a73f602ece634a87a483ff61703151f3ba91
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://gettraff.ru/strik?keyword=yu+gi+oh+episode+1+english+dub In PDF document text
    • http://sajakel.simplyjesusblog.com/uploads/1/3/1/4/131437875/4198428.pdfIn PDF document text
    • http://files.vertexflorida.com/uploads/1/3/0/7/130776745/164020.pdfIn PDF document text
    • http://vuduki.embeinspiration.com/uploads/1/3/1/6/131637352/wusopudekuga_woripisojutazas_junodejin.pdfIn PDF document text
    • https://site-1048244.mozfiles.com/files/1048244/vadiponiz.pdfIn PDF document text
    • http://files.itisallaboutlife.eu/uploads/1/3/1/1/131163879/narot-mamam.pdfIn PDF document text
    • http://xiwisit.elizabethcooperdesign.com/uploads/1/3/0/8/130873982/zaliv.pdfIn PDF document text
    • http://files.judgedawsonyoga.com/uploads/1/3/1/6/131636954/rixazazamugorab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3366/0062/files/hogue_ak_grip_plum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9761/9621/files/dark_knight_strikes_again_art.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3697/3983/files/keep_change_flip_fractions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000089cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CF 5716 bytes
SHA-256: 511086bd7e4a52e81947fdad919de6dfb957cf0e4d97547fda57b13e2270e564
font_01_sfnt_off00009d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D60 5068 bytes
SHA-256: 8ba16f4c5fd469b8a3a6fca207947c36921d20899fb95c6a152ae1f86a8308f7
font_02_sfnt_off0000ae9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9C 10680 bytes
SHA-256: 371ddf0618eeb5dc76942a03713dcc5a64be7be4336140b47ba73593665c290c
font_03_sfnt_off0000d251.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD251 16132 bytes
SHA-256: ca0bb856d51d4c440eb4e48db524e4b4a87bf80294704eab3ae97752e74326e1