Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a1cebf32e204c3…

MALICIOUS

PDF

77.3 KB Created: 2021-03-21 04:35:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1643465afd9172a663788be4052ae664 SHA-1: c2ac8186384afb0e463875cd33f375930e97ef3b SHA-256: b9a1cebf32e204c3ef599ade7aef3864ad27dc9f294e3fda41df9ab3ca3d97e1
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the true malicious destination through a large number of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=red+dead+redemption+2+official+guide+book PDF link annotation
    • http://nosinoski.shop/kabutumudiwu26n5y.pdfIn PDF document text
    • http://studyweb.site/pofemimur5j90w.pdfIn PDF document text
    • http://netlysy.online/86344989009ib5g0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_6021036fe9029.pdfIn PDF document text
    • http://moshon.space/kobalt_26_gallon_air_compressor_dimensions1op5m.pdfIn PDF document text
    • http://clubstore.info/paguxowltt7.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/4wThiii/dino_city_rampage_3ds_cia.pdfIn PDF document text
    • http://trastqort.online/hot_blast_wood_stove_blower2l8oz.pdfIn PDF document text
    • http://wordsideget.top/kerekudavuradikizoqrq33.pdfIn PDF document text
    • http://alifan.store/al_quran_malayalam_malabar_translation_mp3obogs.pdfIn PDF document text
    • http://smartradiobf.ru/mercruiser_5.0_service_manual0q9ln.pdfIn PDF document text
    • http://marketitaly.info/husqvarna_automower_315_operator_s_manual4onku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444622/normal_60270c87c21e3.pdfIn PDF document text
    • https://cdn.sqhk.co/vemunaxudug/dSihhgo/2028599193.pdfIn PDF document text
    • http://titoto.xyz/a_first_course_in_database_systems_3rd_edition_free_download49nlz.pdfIn PDF document text
    • http://investmag.org/padobakoxovaduzisekagun1axr2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485165/normal_60382f53d1362.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/Yggjcij/fufoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/vavetiset/iiVhcgd/jalakipi.pdfIn PDF document text
    • https://cdn.sqhk.co/gulanuwe/boTaidw/profile_reports_followers_analytics_for_instagram_android.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca821bb2-95ee-47f8-8935-b15bf9459504/82768402785.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/294a9f9e-4cea-44e4-8533-85040d19acc2/59257426448.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2c2fd5d-9b1f-4b1f-9ee7-a598cf90b4ac/is_boston_market_food_healthy.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_off0000ecf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 5640 bytes
SHA-256: a28ddad968136e2895264273d1e6d7a450ad4e472cc23d3ee0cb0215a80dff0f
font_01_sfnt_off00010027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 11024 bytes
SHA-256: c74cfe837b035d300127d179be63a4a8de2f9f59820238ea1189a6bea4df1888

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