Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc9e4428dca49952…

MALICIOUS

PDF

76.1 KB Created: 2021-04-04 13:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ebdcb2f641cd46f5c02f3c7740396711 SHA-1: 408c90e5858a33b296b7c7b76d3c900b31f8f54f SHA-256: fc9e4428dca49952abfe66dae0998b9e81e208a6561c6a79b16b65aba3545374
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://maypoin.ru/123?utm_term=maths+division+tables+worksheets PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416786/normal_5fdd42a66c83a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470961/normal_6043120ae905b.pdfIn PDF document text
    • http://grigolia-studio.ru/inequality_word_problems_worksheet1lvf8.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/iiitjcl/adidas_nmd_r1_japan_pack_black_2019.pdfIn PDF document text
    • http://vizionsmc.net/solopadvgthw.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/YghjeF4/75618354786.pdfIn PDF document text
    • http://fito4ka.xyz/91563619197py4yg.pdfIn PDF document text
    • http://hrushch.space/61422183985zwjxd.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxaletadi/PUghpjb/65617887584.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405194/normal_5fca5722c1ed8.pdfIn PDF document text
    • http://doctora.club/tusafurewr86u.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/1ekcjjL/fr_legends_mods_ios.pdfIn PDF document text
    • http://hrushch.space/16429193346i3wd.pdfIn PDF document text
    • http://nanolenka.xyz/bard_s_tale_apk_revdlhviqm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_4095d0705cd64050bba536c823bc72a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dixaleko/dsc_alarm_set_time_and_date.pdfIn PDF document text
    • https://3edbbcf3-b5b1-446e-9630-835d38fa79e0.filesusr.com/ugd/6908d7_19e6da8a0d824084967cfea00d7c722d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wopari/medical_incident_report_example.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_3c3c606c106e438ab9af092d0d1c9d86.pdf?index=trueIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_d4b1574d4c4b42998333376e836b3433.pdf?index=trueIn PDF document text
    • https://367e539a-c541-4439-991c-4bf2bef2aa7a.filesusr.com/ugd/77d535_c2ca9c724b1e4974ab0321ea02b709df.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_off0000ebc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 5276 bytes
SHA-256: e86c2d1263b82d2585f00baff77a86bc6f33722ec9798adfed597ed7c655c228
font_01_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 10948 bytes
SHA-256: 8aec60e36525cb37c6df0796e7a682b82990a26c27f8e6b738f926cb744a395a

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