Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdb2ef17d3cbb46…

MALICIOUS

PDF

75.5 KB Created: 2021-02-20 12:54:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5671786471c210619373ed2cfc26367d SHA-1: 7f9e50e7d4176f9bca9c309534e75c3b7cc05a2d SHA-256: 8cdb2ef17d3cbb46a296b1dd0769de32dcd6f34c986bc221318db5443142736d
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/wix?keyword=respironics+remstar+pro+c+flex+manual
    • https://cdn-cms.f-static.net/uploads/4414336/normal_600f7f948879d.pdf
    • https://static.s123-cdn-static.com/uploads/4414498/normal_5fe35738dd82b.pdf
    • https://gidorimafemona.weebly.com/uploads/1/3/4/8/134867851/gagux_burabedomoka.pdf
    • http://ubsvp.com/how_to_blend_colored_pencils_crayolayk3fl.pdf
    • https://posajegodat.weebly.com/uploads/1/3/4/4/134477503/meporuzojoxe.pdf
    • https://cdn-cms.f-static.net/uploads/4463298/normal_602b71a7c7179.pdf
    • http://goproonly.com/4501884118617uqj.pdf
    • https://vijivavepedu.weebly.com/uploads/1/3/4/3/134313627/1019088.pdf
    • https://kinumefiboposif.weebly.com/uploads/1/3/4/8/134865532/f696a9c9.pdf
    • https://static.s123-cdn-static.com/uploads/4391326/normal_5ff3305296a6a.pdf
    • https://foxakiletomuxo.weebly.com/uploads/1/3/4/0/134012751/d6c7fecc8e953.pdf
    • https://cdn.sqhk.co/fapiwejagiz/aT52dYV/blade_crafter_2_apk_mod.pdf
    • https://dajixogemozuv.weebly.com/uploads/1/3/1/4/131438707/popusaf.pdf
    • http://meriline.store/dragon_pet_games_online6yiin.pdf
    • https://cdn.sqhk.co/bimeniwog/jaihAie/xozezenopimu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mupukesunobaga/bipelatamijejiwijo.pdf
    • https://s3.amazonaws.com/jotogorurekuro/40105446840.pdf
    • https://s3.amazonaws.com/rawesaragegugar/vamevegamuw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea1b.bin
7eeca707e9a815efcc717fb40cc572efd8c64d5518490e9885f6e5073f385146		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1B 5236 bytes
font_01_sfnt_off0000fbde.bin
bde18de7dfdc75d1f531d6947e8ce691784b6c00bc6c5816a63e35154e71e950		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDE 11436 bytes

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