Malicious PDF — malware analysis report

Static analysis result for SHA-256 498ed8b86f0c0a68…

MALICIOUS

PDF

78.9 KB Created: 2021-03-20 16:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: dfb18634af4aade1d156b540897852ef SHA-1: bf3250fc813154e0cc64d0727b8b5c716f395daf SHA-256: 498ed8b86f0c0a686b97ed0593f094d17e112a0e3538a3299c211fff65527f86
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely to redirect users to potentially harmful content or phishing sites. No scripts were extracted, but the PDF structure itself is indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://seumenha.ru/wix?keyword=stuart+hall+cultural+identity+and+diaspora+reference PDF link annotation
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/4bd5118.pdfIn PDF document text
    • http://wagezofon.iblogger.org/hp_elitedesk_800_g1_twr_ram_upgrade.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/riwanitewenux.pdfIn PDF document text
    • https://xumodaniteged.weebly.com/uploads/1/3/4/4/134480563/nisopewo.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/38546439004.pdfIn PDF document text
    • https://feronokemafa.weebly.com/uploads/1/3/1/1/131164109/zikarexidepiwonivuma.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/80780558105.pdfIn PDF document text
    • http://wedasuf.getenjoyment.net/bsc_publication_bank_po_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4528780/normal_5fd7a77873965.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476569/normal_6004cc65e39de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391308/normal_5fe7cb0cae359.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dixikigozasam.epizy.com/59938900913.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_33a52acbab63429eb6f4f8e024637ef9.pdf?index=trueIn PDF document text
    • http://zogosugo.onlinewebshop.net/finelikekugejebatolemita.pdfIn PDF document text
    • http://xilagerezob.epizy.com/26502971865.pdfIn PDF document text
    • http://sazerubewufuzuk.epizy.com/bhangra_paa_le_new_song_pagalworld.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_cfd7a4eab8e24a5a8e7d0b858675a7a9.pdf?index=trueIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_e4aaee79702f45b3bae98ca05ca74930.pdf?index=trueIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_aa172132053943739931f9d37cf356cf.pdf?index=trueIn PDF document text
    • http://dapufojutujat.atwebpages.com/vavelonuxuledubazetasimen.pdfIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_0e8423d02ec845e2b164e93c9e4ffda4.pdf?index=trueIn PDF document text
    • https://df4002df-ed14-466c-b758-10ced248c840.filesusr.com/ugd/3b03e6_22967271030340c2b5cef09ce2871342.pdf?index=trueIn PDF document text
    • https://08202b68-adf4-4b7d-bb06-fcebe54c78b8.filesusr.com/ugd/76dd3d_b723690fc4a7477bacc10779d493d48a.pdf?index=trueIn 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_off0000f24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24F 5448 bytes
SHA-256: df1e53fdf87457b5a46c13b6c3cbe4cda0c0ad05b15b9d250db542e70762e1b5
font_01_sfnt_off000104d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D7 12524 bytes
SHA-256: 59b619daefa974cb9f19ca44ad9760b72a3844f4a2ad87dc48396314ba63668c