Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5a54d35b9d3197…

MALICIOUS

PDF

73.0 KB Created: 2021-01-21 07:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 90c52f1e58c6a5c7595cfb98c3aebc57 SHA-1: 75c0dfe3beb50636071283f2f9393e36e3d3e8ca SHA-256: 8d5a54d35b9d3197f1858913c90b7e35e0dd35f80dfb69535ea59d3c92a56177
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, directing users to numerous external websites, many of which are hosted on disposable domains. The presence of 'wwe 2k18 unblocked games' in a URL suggests a lure to attract users interested in gaming, likely to distribute malware or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent.

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
  • 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://bologen.ru/123?utm_term=wwe+2k18+unblocked+games PDF link annotation
    • https://cdn.sqhk.co/senosekagoko/Xjigshe/find_nintendo_switch_controller.pdfIn PDF document text
    • https://cdn.sqhk.co/belumozobu/ibjdbjb/thumbnail_maker_for_youtube_videos_pro_apk_download.pdfIn PDF document text
    • https://xarudaxukisa.weebly.com/uploads/1/3/4/0/134018653/tolopof-mowoderatifijum.pdfIn PDF document text
    • https://cdn.sqhk.co/suzironanes/w3Mhjra/29833300155.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/J0jgb4Q/vuvedujixar.pdfIn PDF document text
    • https://tazerodine.weebly.com/uploads/1/3/4/5/134598813/mafumiwekog-lupufod-zadojofifexu.pdfIn PDF document text
    • https://rejovofutilux.weebly.com/uploads/1/3/1/4/131484728/5763172.pdfIn PDF document text
    • https://gakosokilexavum.weebly.com/uploads/1/3/2/6/132695298/1332582.pdfIn PDF document text
    • https://sedemosifov.weebly.com/uploads/1/3/0/8/130874126/keworupopuna.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/CWid1ie/mercadopago_colombia_6.pdfIn PDF document text
    • https://cdn.sqhk.co/tavolimogid/t8idge0/vajosenozobaxexe.pdfIn PDF document text
    • https://tabuwesajusa.weebly.com/uploads/1/3/1/8/131856124/bc81321f1.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/hjihijC/31059590304.pdfIn PDF document text
    • https://cdn.sqhk.co/xogodapap/ZbgQgjC/97566344298.pdfIn PDF document text
    • https://cdn.sqhk.co/tozimozeka/chhGGdz/all_for_one_dollar_shop_islamabad.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/ZZiaQpx/13082841649.pdfIn PDF document text
    • https://sedovabopidixo.weebly.com/uploads/1/3/0/8/130813108/7473419b42.pdfIn PDF document text
    • https://cdn.sqhk.co/fevivesuxofo/icha6hd/15157010682.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jidabalelibixu.rf.gd/kijeduvukovul.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_off0000de7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE7B 5848 bytes
SHA-256: 551313e98c64d1d2d14e05203aba6f4f48848466b31640fab8ebf53671fee01f
font_01_sfnt_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 10340 bytes
SHA-256: e9cb8e5318681a6129feee66a31464a818358c5ab19151811b2eac2f1ab5d02f

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