Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b8ba80f66678d7…

MALICIOUS

PDF

71.4 KB Created: 2021-03-01 14:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4c77e6b2f605179b8b6a12883e3cf63f SHA-1: a9845d8a298eb4a6eb3d731720e487e89f2b9157 SHA-256: 38b8ba80f66678d71cde41846a14800c6606d7d8da34a39af855e4b66772e9e1
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://xajibur.ru/award?keyword=what+makes+a+good+speaker+of+the+house PDF link annotation
    • https://kuwovewifinux.weebly.com/uploads/1/3/0/7/130775990/ponodi-tizadus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_5fe5af9f468eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457005/normal_5fc88a07abd84.pdfIn PDF document text
    • https://doxuginuf.weebly.com/uploads/1/3/5/3/135346615/663066.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fceef27af22c.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/47938784853.pdfIn PDF document text
    • http://fibutogu.mywebcommunity.org/detetoga.pdfIn PDF document text
    • https://pepedojimu.weebly.com/uploads/1/3/1/0/131069997/nowifesixinum.pdfIn PDF document text
    • http://mukesuzovuvo.22web.org/16470637022.pdfIn PDF document text
    • https://sagajogesef.weebly.com/uploads/1/3/5/3/135398815/betufaz.pdfIn PDF document text
    • http://sakhavto.ru/windows_98_img_dosbox_download7ecln.pdfIn PDF document text
    • https://tunuzari.weebly.com/uploads/1/3/4/3/134316111/9555117.pdfIn PDF document text
    • https://nizuwutino.weebly.com/uploads/1/3/1/4/131482859/bojonawi.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/2654471.pdfIn PDF document text
    • https://zuxosudeti.weebly.com/uploads/1/3/4/3/134359900/xexakirazisexiwasusu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://damikofem.rf.gd/boss_movie_boss_song.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/generac_4000exl_air_filter.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_off0000d91c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91C 5500 bytes
SHA-256: dfc48c9f0f93546616383835a5bfaaaa24636013fae2e793f73919fde5a905f4
font_01_sfnt_off0000ebb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 10640 bytes
SHA-256: 5bfa34a48d3cbe06609daf4e8a2e8b9db74f78fec75ecdb3aaea2df91f543471

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