Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ae4c818203548a…

MALICIOUS

PDF

83.9 KB Created: 2021-05-08 19:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7ed88ec154ea2621b916c4d01f39c739 SHA-1: 6eb90de23793917f994f3196273020f46f396997 SHA-256: f5ae4c818203548a07893081c227cf2ae48764fc72d547a63216c09edaa0de64
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/strik?utm_term=moon+river+andy+williams+meaning PDF link annotation
    • https://boviseweduxiraz.weebly.com/uploads/1/3/0/7/130776594/1585245.pdfIn PDF document text
    • https://cdn.sqhk.co/godezixibufo/w2jhUge/4798738996.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/how_to_find_dc_motor_efficiency.pdfIn PDF document text
    • https://morimisinasezub.weebly.com/uploads/1/3/1/8/131856414/goxabudu.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/workplace_accident_report_form.pdfIn PDF document text
    • https://cdn.sqhk.co/piravasufinu/HfBihia/sobokurukijarisulepeje.pdfIn PDF document text
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/2776465.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/present_continuous_interactive_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/eE2jgd4/ballpoint_pen_art_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/wapadofiwe/3Ugg2i1/evolution_movie_2015_review.pdfIn PDF document text
    • https://vepovipozo.weebly.com/uploads/1/3/4/4/134472033/lajuk_sunimuma.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/suspicious_minds_book.pdfIn PDF document text
    • https://bapanezuginu.weebly.com/uploads/1/3/5/3/135310050/6829456.pdfIn PDF document text
    • https://tedawubav.weebly.com/uploads/1/3/4/3/134376018/bisodaji_luxebew_boxowoziralaxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d52aed46-be45-4f9b-8106-cf6fc7ee66c0.filesusr.com/ugd/b148e5_2146407203e04d1dafbfee5171fecb3c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7980d3f0-710f-49d8-b654-219b8672ec22/libro_la_metamorfosis_resumen_por_capitulos.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_9978cd70c3d14e1d9d7b0418391742f1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cdfc4c7-c950-4402-9627-844297aaab7a/gatib.pdfIn PDF document text
    • https://fab88ded-2f12-46c9-b6ec-f290036286cc.filesusr.com/ugd/cce69c_c53e22bfb1574887bcdfac6739493c4c.pdf?index=trueIn PDF document text
    • https://d798de41-6847-46d1-b877-4f1b84f556ee.filesusr.com/ugd/3e315c_734b4c41649040829b39ccdc0c3f1d2f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7fe27dc-8ef7-40c7-8163-5f7fcc7d11e7/bissell_powerforce_helix_vacuum_belt_size.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_3d8110f03e9a444f9173e6637153bc2a.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_off000108a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 5404 bytes
SHA-256: f4dfecd052001c478ed9a16a702033e4486c54f5e2fa6e723b2154f49805db75
font_01_sfnt_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 11536 bytes
SHA-256: 7638c57380c8b1d713f95cc10972a5afcbb87cce241eb8c0fbbb3f7e0f1296b8