Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c0b22a42888604f…

MALICIOUS

PDF

67.3 KB Created: 2021-02-19 11:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a01cfbf7b91c877dfbf328e0aebb2c64 SHA-1: 675ee8e3a2e0a1b13d7107cac6ee85dcdaf9982e SHA-256: 4c0b22a42888604fa0b8c020f42911910884846047c8563910e6c0084e9ae7f7
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/wix?keyword=kingroot+apk+4.1+old+version In PDF document text
    • http://worodariravo.22web.org/dewigevinosevikijovos.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/fec82530ca328.pdfIn PDF document text
    • http://axecheat6.xyz/how_to_write_a_speech_for_an_oral_presentation9ydjt.pdfIn PDF document text
    • https://cdn.sqhk.co/kowipopi/nhgIheO/tomimozuzuw.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/4202603.pdfIn PDF document text
    • https://rukuzidin.weebly.com/uploads/1/3/4/5/134517246/midates.pdfIn PDF document text
    • https://ganubidorebe.weebly.com/uploads/1/3/2/7/132740923/fc75a0.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/volebumufagor.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/razivosulekepip.pdfIn PDF document text
    • http://sipamuxagiporen.iblogger.org/mifapofeje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jugefewaxuxuf.epizy.com/calisthenics_exercise.pdfIn PDF document text
    • http://wezojepodi.rf.gd/autocad_2020_mac_xforce_keygen.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/android_vs_ios_development_2018.pdfIn PDF document text
    • http://nogogesusuwebob.epizy.com/golazasozinilo.pdfIn PDF document text
    • http://doveweluzabakiw.rf.gd/zakurojovomisavoteme.pdfIn PDF document text
    • http://rigozapovi.epizy.com/97885991749.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_off0000cab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAB6 5392 bytes
SHA-256: 0ab15686bb0afd0b27c77b73d1232014ef3f44ec365fb58fc08f95511a158d7f
font_01_sfnt_off0000dd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3D 10192 bytes
SHA-256: eb53c21029f25b028318f2ba08a2eb2142eaa5e0d3737e590b049877301c5de3