Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c823e475553c845…

MALICIOUS

PDF

79.0 KB Created: 2021-03-18 05:25:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2ab94549ad3b185f27dac91e1938f613 SHA-1: 83243419c702d84052f21813e30ac6ab8b3d50b1 SHA-256: 1c823e475553c8459902879cfafb35a4ded5e23c00ed03f3c804d07b7bbff147
134 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the overall structure and URL patterns are consistent with phishing or malware distribution campaigns.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=emirates+stadium+layout+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416502/normal_5fcf4af30e6a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382003/normal_60070057af501.pdfIn PDF document text
    • http://good-production9.site/86922895946pt475.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_6046ac057cb3a.pdfIn PDF document text
    • http://palawawez.mypressonline.com/vivotagotabote.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/house_drum_beat_ableton.pdfIn PDF document text
    • http://palubofapejuraw.mywebcommunity.org/contrarian_investment_strategy.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/chicco_keyfit_30_stroller_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/zosiwutu/eR4Bgci/free_klondike_solitaire_download_for_mac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465935/normal_5ffde7b422042.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5ffa152bf19a5.pdfIn PDF document text
    • https://cdn.sqhk.co/mivezifov/UXhb4ho/10669717005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447108/normal_600d1c18d5e1b.pdfIn PDF document text
    • https://cdn.sqhk.co/mazonixun/zCLFghV/police_officer_jobs_in_iowa_city_ia.pdfIn PDF document text
    • http://prequester.online/lowojikob2l8s3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422631/normal_5fc699e84ee4b.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/RRihqpb/furugunoxoxowu.pdfIn PDF document text
    • http://wunuxuvi.sportsontheweb.net/poduxawix.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/iedghjc/wejolelotavazowatibebuwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zutugidod.onlinewebshop.net/lovixaw.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_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 5204 bytes
SHA-256: 4814d3c23f111f5f4dc9f587ea2e4c15e22601e574913c80ca3e032e357d0924
font_01_sfnt_off00010a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A44 10840 bytes
SHA-256: 3401468ce7c86d97855190e86533ca6a0bf0ef7b3ef2c67cda62bb12f37a203d

Open this report in the interactive analyzer, or submit your own file for analysis.