Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae3a12d8ab86faa5…

MALICIOUS

PDF

76.0 KB Created: 2021-03-20 12:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c3e2604e8f9f5f77806e31a9918dd402 SHA-1: b38fe4e2574e307bd8be9da757bf4e2e33649a3d SHA-256: ae3a12d8ab86faa51a30468ebf3130e1a5d52154272cbb33fddfb5fac59eb0a2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to a domain associated with phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to 'Nvs registration form pdf', aligning with a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=nvs+registration+form+pdf PDF link annotation
    • http://irisca.online/editor_template_kendo_grid_mvcb6lhw.pdfIn PDF document text
    • http://eurosett.net/blogspot_de_librosyb0n4.pdfIn PDF document text
    • http://appless.space/fokepegutanbbwy5.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/antibioticos_unam.pdfIn PDF document text
    • http://dkblogin-de.best/applied_optimization_with_matlab_programming_free_downloadboqhw.pdfIn PDF document text
    • http://prizinsta365.site/zabasewamimimuzumiruzeli4sxfe.pdfIn PDF document text
    • http://evgeniy-semenenko.ru/what_is_the_setting_of_between_the_world_and_meq748x.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/wiguribazukapibatos.pdfIn PDF document text
    • http://soldonlakewood.com/manual_del_propietario_chevrolet_sonic_2017g8ony.pdfIn PDF document text
    • http://thesalle.xyz/33816509767lydck.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejarisiwudu.atwebpages.com/28142487224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbe01aa-b12d-46f0-a398-e8d486f05742/dyson_dc17_repair_manual.pdfIn PDF document text
    • http://jukasuxoseki.atwebpages.com/swann_dvr-4575_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb1ff77-5832-4b88-a0cd-049309fc1360/xerude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00a16278-7e13-431c-9ad3-a79a87168479/wojexezuwuremafekapexezu.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_97b7449d469a4a4c80fdd5674bd8dcf4.pdf?index=trueIn PDF document text
    • http://buzanuziti.myartsonline.com/what_are_the_responsibilities_of_database_manager.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/astm_a536_download.pdfIn PDF document text
    • https://e3055f73-6236-423b-b810-4bc1a15f300f.filesusr.com/ugd/fa12d1_3a2e7cd62aeb445d8b39f97eacb8330f.pdf?index=trueIn PDF document text
    • http://nuwadolonopip.onlinewebshop.net/gazodowulumamodibiral.pdfIn PDF document text
    • https://52b03d57-94e3-497b-b2ee-5a576b8f136c.filesusr.com/ugd/67ae49_0e16d28832bc4834a7397a91c6e08238.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_off0000e842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE842 5356 bytes
SHA-256: c0fc640b492e39b0f2b9c676e1ea8e8393bf8f854eb1fcdfaa71b0db03edec3d
font_01_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 11472 bytes
SHA-256: c69d1fe339970f045d5fd2443b5a68a88e8e8994ea9edc66e29f0ee86fe896d0

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