Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b00e97b1410b47…

MALICIOUS

PDF

73.5 KB Created: 2021-03-01 18:53:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 606383d1d334bf7356c389faa3a3745c SHA-1: a223fc2e0b29b7089cb5a8077d8937d7e8ad4110 SHA-256: 15b00e97b1410b47b9f8d69468c9cc830e65f488da25b8056a64a2a87064ef77
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated programmatically to serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=john+medina+brain+rules+f%25C3%25BCr+ihr+baby PDF link annotation
    • http://dkmz2.club/agilent_1100_hplc_manual_injector33ydg.pdfIn PDF document text
    • https://poxejoretojav.weebly.com/uploads/1/3/4/7/134740271/getuzidatikubod.pdfIn PDF document text
    • http://figufesivinex.22web.org/52253760371.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/gdibAie/racing_fever_moto_apk_hack_mod_download.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/how_much_does_a_catalytic_converter_cost_for_a_subaru.pdfIn PDF document text
    • https://bozobamawokoruv.weebly.com/uploads/1/3/4/3/134350924/rugeroku.pdfIn PDF document text
    • http://hempmap.ru/aplicacion_del_flujo_de_medios_de_comunicacion_cruzada_oral_y_escritatrue6.pdfIn PDF document text
    • https://cdn.sqhk.co/medijamowole/ltjcTje/cake_design_pic_hd.pdfIn PDF document text
    • http://ag-management.space/introductory_chemistry_6th_edition_trom8pys.pdfIn PDF document text
    • http://webdefilmizle.com/93811499516u1cxl.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/jhK0giu/48208262672.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/togopamofagubuwivo.pdfIn PDF document text
    • https://cdn.sqhk.co/bulenupulabo/fhcqShg/service_properties_trust_hotels_for_sale.pdfIn PDF document text
    • https://dururamud.weebly.com/uploads/1/3/4/8/134846475/larukanudefubub_jadasubolo.pdfIn PDF document text
    • https://forexegazujolo.weebly.com/uploads/1/3/4/1/134108883/sadekinuw.pdfIn PDF document text
    • https://vinosubolab.weebly.com/uploads/1/3/5/3/135316207/7492fc78865c2b0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wizigipixe.atwebpages.com/jump_force_giorno_giovanna_gameplay.pdfIn PDF document text
    • http://bodasubosixo.rf.gd/80036651547.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_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 5496 bytes
SHA-256: 984372656ae47f2288f9c55c9c7aa5afedd470ea6f6c83abe555dba1dc4f3f74
font_01_sfnt_off0000f25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25F 10932 bytes
SHA-256: 3dfafc4726f40ce3c9feb385e52eac4ad9c2c3d8d000f12483bffb23d6b591b8

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