Malicious PDF — malware analysis report

Static analysis result for SHA-256 30581d00df0a8b54…

MALICIOUS

PDF

80.6 KB Created: 2021-05-17 09:55:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: add2fa55c53fcab695d65f84a7f72319 SHA-1: 09f2b8c19570742a019ce5219f95cb3f103c2037 SHA-256: 30581d00df0a8b54b762a4e59e3121c155e871dee816cdd633f9166a72b011e7
194 Risk Score

Malware Insights

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

This PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to distribute malware or unwanted software. The presence of a URL related to 'adobe premiere elements 2021 crack download' indicates a lure for pirated software, a common vector for malware distribution. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jacksth.ru/strik?utm_term=adobe+premiere+elements+2021+crack+download PDF link annotation
    • https://powufaru.weebly.com/uploads/1/3/5/3/135310655/riwoxexigozenexeg.pdfIn PDF document text
    • http://poriwesebu.22web.org/grade_10_biology_textbook_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5ff56af109679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416661/normal_6050c705978d8.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/funisek.pdfIn PDF document text
    • http://zexawabezazojot.sportsontheweb.net/pugerixevitewob.pdfIn PDF document text
    • https://febumade.weebly.com/uploads/1/3/4/7/134757335/tekewo.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/pleomorphic_adenoma_of_submandibular_gland.pdfIn PDF document text
    • https://nopuderegitiber.weebly.com/uploads/1/3/0/7/130775440/jasilisazunugis.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/8782657.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufobilubaxa.rf.gd/sutuxukowujumixapexa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b26b3380-b14b-4318-885c-2b1d8a4db873/avaya_2420_phone_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9a2d288-b064-4a36-9253-f05d710daf81/35256758719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6e946ec-90f4-4cb9-bb46-7e8307d57379/8898606232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c53bf36-a4a0-4028-b59c-a0eac3d254b8/bmw_navigator_v_for_sale_ireland.pdfIn PDF document text
    • http://rixasidaz.epizy.com/povuxew.pdfIn PDF document text
    • http://sasaxunofob.atwebpages.com/dieta_para_hernia_hiatal.pdfIn PDF document text
    • http://xedemigu.atwebpages.com/basic_analytical_chemistry_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a71050c4-d554-497c-97db-dd3adea033ac/what_kind_of_oil_goes_in_a_troy_bilt_pressure_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b4648e-d210-4f86-8143-658323fbc48c/how_to_program_a_universal_ge_remote_control.pdfIn PDF document text
    • http://miwerigijeki.rf.gd/nuroxirine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66646a75-adbc-47c4-b1a0-fa49c6eaed82/sandisk_clip_sport_plus_not_recognized_by_computer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2284901d-2b72-45ac-81c5-9ea2cfbd6621/how_to_update_grub_config.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_off0000ed61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED61 5832 bytes
SHA-256: 97fd00fc77af61226efdb82a5b6e9559f74955e5a4f2335e6c6b6e59e1053fab
font_01_sfnt_off00010138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10138 21792 bytes
SHA-256: 355eb045bf29116bf91d08e71cf154dd324b20435a843fb3d219358d03a9c3eb