Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ade98c5f56237f…

MALICIOUS

PDF

73.1 KB Created: 2021-03-04 16:58:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 63b3121c20d4b70037b86ecab35b0ea5 SHA-1: 8aa6ad9060ae66d216b55e82c54c06c1f3873fcc SHA-256: 37ade98c5f56237fd4848baa11968e1c4c1ca3cc32a1d0dbdf06f550619f4919
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/wix?keyword=violin+practice+reward+chart In PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_6001bdecec7d4.pdfIn PDF document text
    • http://getsalon.xyz/exercices_de_maths_5me_enchainement_doprationidh3v.pdfIn PDF document text
    • http://msertis.xyz/regofilezaburozumugui4xsr.pdfIn PDF document text
    • https://gadogirunen.weebly.com/uploads/1/3/5/3/135347667/d75aeaaceb93.pdfIn PDF document text
    • https://romiwewigases.weebly.com/uploads/1/3/2/6/132682929/tivipi.pdfIn PDF document text
    • http://goodshopsales.xyz/pancake_milkshake_game_ralphwfx0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_600c082e6fe10.pdfIn PDF document text
    • http://instahelpforbusiness.com/27792283770ha89m.pdfIn PDF document text
    • http://tawaguf.scienceontheweb.net/toyota_camry_2017_price_in_qatar.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/grade_10_math_textbook.pdfIn PDF document text
    • http://zijozarub.mygamesonline.org/worlds_of_history_kevin_reilly_kean_university.pdfIn PDF document text
    • http://swiss-family.space/metodo_de_trapeciosxv5ie.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
    • https://uploads.strikinglycdn.com/files/ce5673c5-703a-4bb9-b15c-2e2707191053/34790679810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56d30d5-d4a4-4fa8-ac77-22ab8d8f9179/how_to_use_canon_rebel_xti_camera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecaecb7f-d534-4234-904c-b809d13f3e0b/marketing_digital_que_es_y_cmo_funciona.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aa14b9b-e5a3-47f2-8fef-5d0fc556d820/dipuzebejazijax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de9ca975-5c4b-47fb-8f46-3de445ded051/nigetilituzavagu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d1cef4-6b70-446d-8fce-59d5215ebf0c/derecho_privado_romano_guillermo_floris_margadant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fa8cf84-a4d7-45d8-b818-5eef282072b1/clinical_introduction_to_lacanian_psychoanalysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947ee5e8-eedc-4e61-abe7-2821faf25943/60601275137.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_off0000d669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD669 4828 bytes
SHA-256: 69c440f19672a807164d89154955272f3790aec2ccc66c409caf162782e502e0
font_01_sfnt_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 10132 bytes
SHA-256: c664014def37020961dad21c7ee6cb4a76d4d394fe7d25e4931ea288b8f073aa
font_02_sfnt_off000108e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230