Malicious PDF — malware analysis report

Static analysis result for SHA-256 8712fd2a3177da17…

MALICIOUS

PDF

85.0 KB Created: 2021-02-24 21:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 99d3276a55dc229eb04b015f08ed770b SHA-1: 1f2a353b58659ba030c407317a805e56ebfb4297 SHA-256: 8712fd2a3177da1704fd245f69377d7b8255c87c37407cf6f834567fe8260bee
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to disposable domains, indicative of a link farm or SEO manipulation scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

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=how+to+make+animation+in+photoshop+cs6 PDF link annotation
    • http://zatoboyvibor.fun/10063031027bo87p.pdfIn PDF document text
    • http://spiritstudio.ru/70586845633w1g57.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/fjaHjgE/20151519180.pdfIn PDF document text
    • https://fizilotot.weebly.com/uploads/1/3/6/0/136050642/e8869de.pdfIn PDF document text
    • http://usacreditmonitoring.info/focusrite_saffire_pro_40_firewire_interface_pricewxycq.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/pvFhbjh/tiny_calendar_daily_schedule_and_agenda_planner.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/gcaiiih/tufudofog.pdfIn PDF document text
    • https://cdn.sqhk.co/kinubowa/Xljhcih/standoff_2_discord.pdfIn PDF document text
    • https://cdn.sqhk.co/kinemefuwa/i00fowJ/joker_sad_ringtone_mp3_free_download.pdfIn PDF document text
    • http://naturalgood.space/palaeontology_invertebrate_henry_woods1waoh.pdfIn PDF document text
    • https://jujamepusa.weebly.com/uploads/1/3/2/8/132815903/rupetabagapumo_toxetiwubadu_joriwajanij.pdfIn PDF document text
    • http://detonic-buy.website/assistir_furia_de_titas_online_dublado_completofxzmz.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jvhg3ig/bidodamotojurewozuwevo.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/doDjhja/bingo_live_chat_application.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/hfpmhys/world_market_patio_furniture_sale.pdfIn PDF document text
    • http://copyright-helps-team.com/81282654323ne3ip.pdfIn PDF document text
    • http://wide-do.top/771821304288q959.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00010e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5A 5316 bytes
SHA-256: b708bbf9750eb228b22ecb528e290deb0e25faa4db360ee4b4214b4521f319a3
font_01_sfnt_off00012058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12058 11392 bytes
SHA-256: 9949d7de9a793506a9be0f5c3ddacabce51934b4bdd89207e887a1aaea5c2b8a

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