Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdac2a582eef2c41…

MALICIOUS

PDF

47.7 KB Created: 2020-10-06 15:37:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 36db019987fe8e4042b78766520a7493 SHA-1: 3303cbd4a266305956485f0c808ab8f30c9af236 SHA-256: bdac2a582eef2c412eb80ceeebbeb2a9da9e8e3fa5f27462ef76c33d159a623f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=statistically+sound+machine+learning+for+algorithmic+trading+pdf In PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/sijomofudutifagejakakinaw.pdfIn PDF document text
    • https://site-1037122.mozfiles.com/files/1037122/70289094129.pdfIn PDF document text
    • https://site-1040136.mozfiles.com/files/1040136/duletu.pdfIn PDF document text
    • https://site-1036796.mozfiles.com/files/1036796/zijamagigudowebubuzemo.pdfIn PDF document text
    • https://site-1041770.mozfiles.com/files/1041770/welefanogex.pdfIn PDF document text
    • http://files.kravmagastavanger.com/uploads/1/3/0/7/130776150/xelijuzijo.pdfIn PDF document text
    • http://kovewivu.bellevilledistrictkennelclub.com/uploads/1/3/0/9/130969110/gazuvuloxagonej_kopuvem_dugaza_gubumiraj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/912c727c-b042-4f13-a41d-3307cb8ab2a6/8936426175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6351f50-67df-401b-9c73-00b3963172b2/jasoluluni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47889e45-4017-4a49-b421-827fb2443a3d/lumelizesusafob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d97d14c-13aa-41db-bcb7-b6efc30714f3/27463045422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9720496a-666f-4fc2-b725-bec2e179a899/vabef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f84803ec-2ff3-488e-8c24-923b4099e507/miwiriwux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcda1215-3f99-4773-8631-3c30b651c644/45850487464.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90958ca5-7167-4970-a7cc-9862acdd387a/vevera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f98aaa-0e10-4ac7-b605-e4a90b131291/gilafopulepovowezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415d4392-1a89-4b12-9e09-a0bfce09070d/nitoremagejivi.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000662b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662B 5776 bytes
SHA-256: b8570852fc661d292cf3e6ff74d8f60445804bdaa1f7cfa84a3dd0f301587371
font_01_sfnt_off000079b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79B5 10416 bytes
SHA-256: a892c2761d1ae5b307a8565eb4bb1e08465bcf1241d6fee2f997bcbf4311811f
font_02_sfnt_off00009c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C70 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74