Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb273f6f5c6e499…

MALICIOUS

PDF

78.0 KB Created: 2021-04-25 07:25:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 4e9befeb0aade1519f3897f123b35071 SHA-1: ee48f75fc6fc04b330505a23f1079f3bc96bcc32 SHA-256: 2eb273f6f5c6e499b22b8c2970001a7ef4dea753bf1b7c1f468c6df0d9ff4f6b
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains or are used in a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware distribution. The embedded URLs and the structure suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

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
  • 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.
  • 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://ponafet.ru/strik?utm_term=weber+smokey+mountain+18+assembly+instructions PDF link annotation
    • http://motorutovibipe.sportsontheweb.net/69727132140.pdfIn PDF document text
    • http://degakak.sportsontheweb.net/modified_barthel_index_mbi.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/seduboxafakunoru.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/manifesto_pakatan_harapan_johor.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/rijuguvajitudomogolaxo.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/5961293572.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33da92c3-26de-4f6b-bf12-1693cb6a6e79.filesusr.com/ugd/0307f2_d95125fc2b9a4655941b6db7d03afcbe.pdf?index=trueIn PDF document text
    • https://917ed8d3-8a9f-4c5c-a3ad-554e533308ad.filesusr.com/ugd/a4e402_d2de5e0d5d7f45cb88a85586a6d35d3e.pdf?index=trueIn PDF document text
    • https://a513df27-8ea1-49e5-9b48-af726a3c99b5.filesusr.com/ugd/c567c1_a2b2baf0e71c42e0a75d9b93847d60eb.pdf?index=trueIn PDF document text
    • https://786c536d-253b-4a15-94df-129c4693a223.filesusr.com/ugd/1fc311_1414c19fb2994d3ea69eab32c0850010.pdf?index=trueIn PDF document text
    • http://vumamuv.myartsonline.com/do_cows_stay_outside_at_night.pdfIn PDF document text
    • http://kumexitogo.epizy.com/descargar_revista_casa_viva.pdfIn PDF document text
    • http://jujageritoxo.atwebpages.com/fesujapewuwava.pdfIn PDF document text
    • http://dikedelunok.rf.gd/humminbird_helix_5_chirp_sonar_gps_g2_review.pdfIn PDF document text
    • http://wudokuzogikozu.rf.gd/lovavuxabopiwesodenawi.pdfIn PDF document text
    • http://pixewinodak.epizy.com/publication_550.pdfIn PDF document text
    • http://murarefap.epizy.com/vixejolexuzir.pdfIn PDF document text
    • https://87098103-4d08-48bb-90a6-807b0ef734b2.filesusr.com/ugd/1f49de_384082b052394165ba915ce7e2adc23c.pdf?index=trueIn PDF document text
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_c174376ec73b4597919be3f68a3a6ccb.pdf?index=trueIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_4daadbdf4a1a4e97a390ba8315818173.pdf?index=trueIn 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_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 5508 bytes
SHA-256: 47d99bad2b4def9ad8bff6cc1c4bbdc7c8558da32463a76c59e19478e499a821
font_01_sfnt_off0001034c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034C 11996 bytes
SHA-256: 3e183c498fc7414fa8efd94379e909b3db866c61535aaf224101f8de31f7bbdf

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