Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bcb9f8eeb670905…

MALICIOUS

PDF

98.8 KB Created: 2021-03-19 06:33:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 162ef239567fe064630722a7e89d5a2c SHA-1: a562a6a671e32f19bf52ae4a436812610bbd764c SHA-256: 6bcb9f8eeb670905cadb7518f3732862acd5beb20fcffd3580e56e05b8ed41b3
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 a large number of external URIs, many pointing to disposable domains, suggesting a link farm or phishing infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a 'university of bath campus map pdf'. No scripts were extracted, but the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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://golowaki.ru/award?keyword=university+of+bath+campus+map+pdf PDF link annotation
    • http://tamodemuror.getenjoyment.net/business_partnership_agreement_letter.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/jeseful.pdfIn PDF document text
    • http://wosedumuf.mywebcommunity.org/cours_afficheur_lcd.pdfIn PDF document text
    • http://goproonly.com/data_science_certificate_online_canadakxdkl.pdfIn PDF document text
    • http://italystore.pro/boworipisexitokezijewotegyk1u.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/zapaxozasuzupowotaw.pdfIn PDF document text
    • http://sevagawos.getenjoyment.net/99324699559.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/enriques_journey_summary_chapter_69dov7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_60152d68dfc0a.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/palepinovumetod.pdfIn PDF document text
    • http://pokavitapizinuv.iblogger.org/allu_arjun_new_movie_songs_samajavaragamana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443578/normal_60337cc5322b6.pdfIn PDF document text
    • http://leopards.space/romabil1rzg2.pdfIn PDF document text
    • http://vitrinachel.ru/problemas_de_porcentajes_6o_primaria_resueltost4mr7.pdfIn PDF document text
    • http://bexodasavuf.22web.org/58152420255.pdfIn PDF document text
    • http://fiduvizowema.iblogger.org/crowdsourcing_platform_in_malaysia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373520/normal_5fd8d9f8e3ab3.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/project_report_on_road_accident.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://suginuzebaluwom.rf.gd/talk_to_me_by_vivian_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080b7346-1ce0-4b5e-bb5c-3315c3e0444f/product_management_books_for_beginners.pdfIn PDF document text
    • http://kapirexazi.onlinewebshop.net/zobizunaja.pdfIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/94121767220.pdfIn PDF document text
    • http://kimibixapi.epizy.com/nilasirenapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af146773-7bc1-443b-af27-8719bdbe1d12/balancing_chemical_equations_worksheet_answers_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee5a41fe-7031-48bd-bbb3-e473bffe7806/waxazasomitad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7ea45e-5ed4-4564-8eff-782845a4f9ff/sekimabatugu.pdfIn PDF document text
    • http://nujebij.onlinewebshop.net/exercices_verbes_etre_avoir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b7d3e44-9535-4510-994f-d0233cae957c/xegobexivulozejaroguwabo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001350e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350E 5536 bytes
SHA-256: 4ce2b0539466d38affe78c9e0b3ffec911244d1d0e5b2884ec9d426285b51f0e
font_01_sfnt_off000147b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B5 11072 bytes
SHA-256: fea835b49a54953ba904fa7b252b36369a1900d4897c26c098670acec317b06a
font_02_sfnt_off00016da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DA4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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