Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a9f424580e5de6…

MALICIOUS

PDF

73.1 KB Created: 2021-06-07 15:10:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 74458eab199cf1980eafe6f785afdd08 SHA-1: eddf45c7159bbcbde8b4ad4f0f3dd3f9ef89b242 SHA-256: 00a9f424580e5de670412d1572afd3414c7b1bc1aa2dffbd0612223018d9da9e
146 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. It contains numerous external links, with one pointing to 'wastran.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating its generation method rather than user-facing content, further supporting a non-legitimate purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://wastran.ru/pbw?utm_term=ms+excel+2013+macro+tutorial+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376125/normal_5fe3f34b1b841.pdfIn PDF document text
    • https://zinikatutonew.weebly.com/uploads/1/3/4/5/134504697/2153826.pdfIn PDF document text
    • https://dixatobuvug.weebly.com/uploads/1/3/5/3/135321084/0d7c54.pdfIn PDF document text
    • https://daxogane.weebly.com/uploads/1/3/2/8/132815110/dijoborifik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_604ce4be12d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378856/normal_601cb584e41a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388825/normal_60528662572ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385235/normal_5fcc9b654a875.pdfIn PDF document text
    • https://bebaguromiva.weebly.com/uploads/1/3/0/8/130813696/63972c2d5.pdfIn PDF document text
    • https://fafamamijusoma.weebly.com/uploads/1/3/4/3/134371196/49676813a59924.pdfIn PDF document text
    • https://risixugetiso.weebly.com/uploads/1/3/5/3/135317557/fikulizugavikikar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fc8277c0f40d.pdfIn PDF document text
    • https://sinidakebe.weebly.com/uploads/1/3/4/5/134591073/munirebokaxe_kobukasumegi_lofomapo_kimilenu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://morabef.pbworks.com/w/file/fetch/144746175/durga_saptashati_path_in_marathi_free_download.pdfIn PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144584403/rezozidaxidul.pdfIn PDF document text
    • http://lexibitite.pbworks.com/f/free_editable_funeral_program_template_publisher.pdfIn PDF document text
    • http://mibegenav.pbworks.com/f/how_much_co2_does_the_world_produce.pdfIn PDF document text
    • http://fowobok.pbworks.com/f/how_to_refill_a_vape_pen.pdfIn PDF document text
    • http://lovizabodi.pbworks.com/w/file/fetch/144740790/al_quran_bahasa_indonesia_pro_full_apk.pdfIn PDF document text
    • http://duziruromeja.pbworks.com/f/manufactura_ingenieria_y_tecnologia_volumen_1.pdfIn PDF document text
    • http://vogituvu.pbworks.com/f/pelicula_de_baile_urbano_parte_1.pdfIn PDF document text
    • http://barumena.pbworks.com/f/minecraft_crafting_recipes_mod_1.12_2.pdfIn PDF document text
    • http://nemupaludol.pbworks.com/f/free_coordinate_graphing_mystery_picture_worksheets.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_off0000dbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE4 5864 bytes
SHA-256: d578d950c5ed94c67782c72402ca3c257d93884a34ab8647e63ce0ad00de7273
font_01_sfnt_off0000efd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD4 11420 bytes
SHA-256: 20653d3636d660bdc9181cd41df87b8a80ff824f6606815a1aae6d02a3f19750