Malicious PDF — malware analysis report

Static analysis result for SHA-256 15d0bd662467fd04…

MALICIOUS

PDF

45.2 KB Created: 2020-10-10 12:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7a4788352fae86b572f0167b8aedd4e0 SHA-1: d0e26b1c09a2815a19dfea67f9cd5dd74aa616fc SHA-256: 15d0bd662467fd0453861a6a4325dc01b46d1f408e07ef6ac2a5945d135bad5a
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://ggtraff.ru/pify?keyword=pitbull+beagle+mix+size In PDF document text
    • https://site-1042198.mozfiles.com/files/1042198/kovegexa.pdfIn PDF document text
    • https://site-1040145.mozfiles.com/files/1040145/bumadebesipevivojenakuki.pdfIn PDF document text
    • https://site-1048557.mozfiles.com/files/1048557/37235572130.pdfIn PDF document text
    • https://site-1040099.mozfiles.com/files/1040099/bujimowojawajow.pdfIn PDF document text
    • https://site-1040096.mozfiles.com/files/1040096/wufexibamoduraxugideluvu.pdfIn PDF document text
    • https://site-1039903.mozfiles.com/files/1039903/20897019829.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/24231968491.pdfIn PDF document text
    • https://site-1039143.mozfiles.com/files/1039143/90685673795.pdfIn PDF document text
    • https://site-1041676.mozfiles.com/files/1041676/kidujapa.pdfIn PDF document text
    • https://site-1038454.mozfiles.com/files/1038454/duwulobixanimavoriji.pdfIn PDF document text
    • http://sekufa.working-class-women-writing.co.uk/uploads/1/3/1/4/131483337/xozajamu.pdfIn PDF document text
    • http://xawidux.silkgallery.ca/uploads/1/3/1/4/131408618/e64ee78.pdfIn PDF document text
    • http://files.centralmofirst.org/uploads/1/3/0/7/130740173/653793fe.pdfIn PDF document text
    • http://files.monicabasile.com/uploads/1/3/1/4/131452817/fuloradasefoku_rofejojix_fuxoroviwija.pdfIn PDF document text
    • http://files.humanist-sociology.org/uploads/1/3/2/6/132696113/volukatiz-semevijugugele.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 5168 bytes
SHA-256: e7958c4306c14cf8f22c51c2f44578ff744665ac8b47eb9fb924031cef6fedb7
font_01_sfnt_off000086d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D3 9780 bytes
SHA-256: 610e754ea0d8acc6186c8be381c99ee90bab9625b7a837d2f4149272c683cd24

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