Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d07b0f7643ecbb…

MALICIOUS

PDF

76.8 KB Created: 2021-02-14 11:34:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c0ce928d5ad4ef43d4153b236fc09077 SHA-1: 0130dc81ddd89f6efd743439e36a966cd972ccad SHA-256: 51d07b0f7643ecbb2e98c4d53214b967e8634e8d7a8c66468521a718ae074148
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/123?utm_term=king+of+fighters+99+ps4 PDF link annotation
    • https://xekukagakodepa.weebly.com/uploads/1/3/3/9/133999272/c389002f1.pdfIn PDF document text
    • https://gewewipuno.weebly.com/uploads/1/3/0/7/130775766/724d348a55.pdfIn PDF document text
    • https://fevokixesebu.weebly.com/uploads/1/3/0/7/130776230/xosebipixiwutir-suvefo-kopejifageg-dejomigol.pdfIn PDF document text
    • http://pasasem.iblogger.org/582646629.pdfIn PDF document text
    • https://cdn.sqhk.co/lopumilekana/gfjjczN/lupaperije.pdfIn PDF document text
    • https://xuxukiworizep.weebly.com/uploads/1/3/4/7/134723333/9174665.pdfIn PDF document text
    • https://buzubexod.weebly.com/uploads/1/3/4/0/134017192/basarowevosoji-kukemevug-mamuvov-xejigakuj.pdfIn PDF document text
    • https://zizusufake.weebly.com/uploads/1/3/4/6/134646877/6665837.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/fgjhije/98159036905.pdfIn PDF document text
    • https://cdn.sqhk.co/jesisuvov/jyhbgcC/repost_apps_without_watermark.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bosirizowu.rf.gd/miraculous_ladybug_season_2_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/adobe_reader_software_free_softonic.pdfIn PDF document text
    • http://risumipekalur.rf.gd/87147811538.pdfIn PDF document text
    • http://tiriburud.rf.gd/appium_capabilities_for_android_emulator.pdfIn PDF document text
    • http://dekixugo.epizy.com/bavexuzikaxolasomitinewo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 5136 bytes
SHA-256: 166ce154e49de45665a6866830e3f2b640901e76d4048d7264b637e63c8c84d2
font_01_sfnt_off000101e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E7 10880 bytes
SHA-256: 774fc6b98ccf3aa9f17badb216c7618708c996ca01a51105636397529f45627b