Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3069fc1d502359…

MALICIOUS

PDF

82.5 KB Created: 2021-03-30 02:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e8420a1a2b563122c10d04e2223f5a03 SHA-1: 54ab0ff20684eaea50b975e5eda04c00ac2bb7c7 SHA-256: 1a3069fc1d502359eaf84a7e5e83163b0667524e3f69145b17fd1fd3ff868fff
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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://jumiwimov.ru/award?keyword=bachelor+of+education+thesis+pdf PDF link annotation
    • http://bostpolamos.site/dean_koontz_devoted702r1.pdfIn PDF document text
    • http://jumpfs.space/tejemudivelq9njk.pdfIn PDF document text
    • https://dawemewi.weebly.com/uploads/1/3/4/7/134747996/dufosewisi-wubanimeb.pdfIn PDF document text
    • http://noksipals.online/kabakovrobu2.pdfIn PDF document text
    • http://profmaster74.ru/how_does_the_book_rosemarys_baby_endopraz.pdfIn PDF document text
    • https://tumupapixukuju.weebly.com/uploads/1/3/4/8/134852222/8935318.pdfIn PDF document text
    • http://stylecurtains.com/top_chatbot_development_platformsq7c53.pdfIn PDF document text
    • http://leafester.online/what_book_comes_after_new_moon675vq.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/togawumojs0z07.pdfIn PDF document text
    • https://xizodekez.weebly.com/uploads/1/3/4/7/134769153/2647175.pdfIn PDF document text
    • http://zavulibalox.mypressonline.com/economically_weaker_section_form_rajasthan.pdfIn PDF document text
    • http://opendouche.xyz/82999069678nr0t2.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/shoprider_valencia_mobility_scooter_manual.pdfIn PDF document text
    • http://wupunekum.getenjoyment.net/9815694748.pdfIn PDF document text
    • https://viluxesoxumubi.weebly.com/uploads/1/3/1/4/131406714/wovovoluvoka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kotenu/mubif.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/64059803884.pdfIn PDF document text
    • http://pumikowexudat.onlinewebshop.net/test_de_bienestar_psicologico.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/mulazimotavosebidabofug.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/wenibotifakixafidizuzoru.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/jejefimozanifilesajumer.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/what_does_scientific_reasoning_mean.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/98667795488.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/nomatimuf.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/wivusowakekezogumijunex.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_off00010637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10637 5292 bytes
SHA-256: 2896252d8fc895248d82e25a015b60addfecc04d60ab8c2486391ecdbc58068d
font_01_sfnt_off00011834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11834 10600 bytes
SHA-256: 8bfc047ba7b60563dd3bdb536271be88866bf6bd56b98f077d199d787c682bdc

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