Malicious PDF — malware analysis report

Static analysis result for SHA-256 289e876544399c99…

MALICIOUS

PDF

81.4 KB Created: 2021-03-08 14:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6bcf36cb06d30dca6d8beb8834cd659d SHA-1: c0519ffa1aa6592eff6acdfcbed55e23a2a1a697 SHA-256: 289e876544399c994c0fd44b2e6aef0501fa0be1ce142c698a252bfcba2a3b97
126 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to malicious sites, specifically identified as a phishing attempt. The embedded URL 'https://gimoguvi.ru/strik?utm_term=ver+pelicula+cuenta+conmigo+en+espa%25C3%25B1ol+latino' is a primary indicator of this malicious intent. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://gimoguvi.ru/strik?utm_term=ver+pelicula+cuenta+conmigo+en+espa%25C3%25B1ol+latino PDF link annotation
    • http://galoomer.online/2018_cadillac_xt5_luxury_manualoiz8o.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/seramonizufisaxikim.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/egjhhba/likert_scale_analysis_excel.pdfIn PDF document text
    • http://yewes.space/zuxevagusagoganilefivivonyv7zx.pdfIn PDF document text
    • https://lidutefavova.weebly.com/uploads/1/3/4/0/134012516/nubowomevil-mitemere-ruwigafewolegi-zezomep.pdfIn PDF document text
    • https://tifomuzaki.weebly.com/uploads/1/3/1/1/131163977/9117557.pdfIn PDF document text
    • https://zobigitesi.weebly.com/uploads/1/3/4/6/134691723/ridaxalilujibupon.pdfIn PDF document text
    • https://ganivakolijovi.weebly.com/uploads/1/3/4/6/134666525/6917883.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/WR9jqgM/birthday_cake_ideas_for_your_best_friend.pdfIn PDF document text
    • https://cdn.sqhk.co/ponajadu/zZeyQgd/ludazorevibaloziz.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/88461642708.pdfIn PDF document text
    • http://mejumeroxara.mywebcommunity.org/zegakegexinimoda.pdfIn PDF document text
    • https://wovigapugup.weebly.com/uploads/1/3/2/7/132710676/xemelusejijobupaf.pdfIn PDF document text
    • https://cdn.sqhk.co/negixakozaxu/wjehPdp/new_ups_warehouse_goodyear_az.pdfIn PDF document text
    • http://beririka.scienceontheweb.net/triangle_congruence_test_answer_key.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://bexukavibume.myartsonline.com/how_many_carbs_in_a_sonic_burger_without_bun.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/action_jackson_film_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/refractory_epilepsy_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/microsoft_access_templates_for_business.pdfIn PDF document text
    • http://mifojizu.myartsonline.com/4186522437.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/google_drive_files_without_zipping.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/53546684412.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/43326441173.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/91477983958.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF1 5312 bytes
SHA-256: 29e9588c0224406c6a52da48f4d8e5d26c78f3cae449e132a0a8d8e625b5dd58
font_01_sfnt_off0000ef9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9D 6200 bytes
SHA-256: e5218d8ee99dadb5c707df455013b80fea3cb015bbad75b6f5c128185a745e85
font_02_sfnt_off000100ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EA 11628 bytes
SHA-256: 9ae5889dfd3bc10c8ecec75df12aed5e1ceb2c14a19837512c39dff4c7b5a691
font_03_sfnt_off000126c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3