Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb00943670f6fde…

MALICIOUS

PDF

71.1 KB Created: 2021-02-13 22:29:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b0a203e232e621a055d4509807682076 SHA-1: eb88d53f2cf0cf670fd698e9c11df7be02cf2db0 SHA-256: ecb00943670f6fdeb9d1b89a57e39f244e1f61f497f33d865548afce17dfb8cf
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/aws?utm_term=flannel+sheets+on+sale+target In PDF document text
    • https://cdn.sqhk.co/vagewovupug/ngdcifm/45301121113.pdfIn PDF document text
    • http://hyipinvest.site/40440230704mxyum.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/GmhdWrn/gefufaraxa.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/YYiaXia/arabic_fonts_download_for_windows_10.pdfIn PDF document text
    • http://bazis-rostov.com/gi_cn_bn_trinh_gp_tphcmhu5mv.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/Sjdihid/from_the_sea.pdfIn PDF document text
    • http://segowesilo.iblogger.org/12626368222.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/shdPhhK/mods_prison_escape_maps_for_minecraft_pe.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/igdwOZN/67913535319.pdfIn PDF document text
    • http://redirunna.xyz/clash_royale_hack_ios_2019qcv5j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/38308389602.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/jajenivaresasedimil.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/local_guide_fake_reviews.pdfIn PDF document text
    • http://panafinuniro.epizy.com/13208166265.pdfIn PDF document text
    • http://xadebomuf.rf.gd/medimaruxu.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_off0000d94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94E 4904 bytes
SHA-256: 0e310f6602a8614cb67e2165fa35c5476a297753f251d3c0032779eb7a5aac10
font_01_sfnt_off0000e9f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F5 11668 bytes
SHA-256: 315e283acbc5d678139514129804c2cdc8924da064df02ada88f49516b27a169