Malicious PDF — malware analysis report

Static analysis result for SHA-256 62369a1d17c79608…

MALICIOUS

PDF

73.5 KB Created: 2021-06-09 01:31:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0fcc467e5b3ff013972d9f253c573030 SHA-1: acaf1be943b11d4fd1e42fd68a795654e713c651 SHA-256: 62369a1d17c79608c27f31d016dc9064eedb409b3ea1a89ff19ff0a94b5fe26b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nomylo.ru/pbw?utm_term=forex+divergence+strategy+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424689/normal_6012e1ce3ada7.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/8212691.pdfIn PDF document text
    • https://voxapuxunud.weebly.com/uploads/1/3/1/3/131381802/butewedojimozebado.pdfIn PDF document text
    • https://madigapelodawip.weebly.com/uploads/1/3/4/8/134846312/fe020c0f99e7e1.pdfIn PDF document text
    • https://miroguwitofenev.weebly.com/uploads/1/3/5/9/135958286/gixaras.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4493221/normal_60b2ff49f41b5.pdfIn PDF document text
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/lidefogabu-nozevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420470/normal_60611769a2545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_606d608e7733b.pdfIn PDF document text
    • https://damenuxorofupob.weebly.com/uploads/1/3/4/7/134711178/ruzijozolonupab-xawagipoxunapu-nizusojoze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_60240cadc9a44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480414/normal_5fce98dfab535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_60621c29b6e84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kibumezi.pbworks.com/w/file/fetch/144557742/8685907061.pdfIn PDF document text
    • http://lopasexosew.pbworks.com/f/29216008948.pdfIn PDF document text
    • http://pesivop.pbworks.com/f/add-friendly_ways_to_organize_your_life_free_download.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/w/file/fetch/144528771/peliculas_de_accion_completas_en_espaol_latino_gratis_youtube.pdfIn PDF document text
    • http://lifelekufa.pbworks.com/f/gun_shooting_offline_game_download_apk.pdfIn PDF document text
    • http://bolejagum.pbworks.com/w/file/fetch/144895902/river_flows_in_you_roblox_piano_sheet.pdfIn PDF document text
    • http://fajopab.pbworks.com/w/file/fetch/144550068/talerekupu.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/w/file/fetch/144481245/vtech_toot_toot_drivers_manual.pdfIn PDF document text
    • http://sixuditar.pbworks.com/f/suma_de_3_fracciones_con_diferente_denominador_ejemplos.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_off0000dffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFE 5476 bytes
SHA-256: f651a2810ca2c22af1717ee913e23ce658f48ca6bf55655ef683371a7432d865
font_01_sfnt_off0000f2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C6 11200 bytes
SHA-256: 38854c01b5922398dfff335f79188dcfb6f13185bb0d5ceb3cab66962c502271