Malicious PDF — malware analysis report

Static analysis result for SHA-256 4334d16d5cc720c8…

MALICIOUS

PDF

38.5 KB Created: 2020-03-27 12:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: ffd2d779191efe55f2e8dbd7d40599d6 SHA-1: 192a3175d8795a6e461ea3646f5fb68e53d3d3a7 SHA-256: 4334d16d5cc720c821e217c069e7c2ab2e5ad82a0084b75825426231d32a085b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document contains a large number of external links to other PDF files hosted on various domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a tactic to manipulate search engine results or distribute malicious content. The document body contains a seemingly innocuous question about Super Bowl winners, likely a lure to disguise the malicious nature of the embedded links. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://hkcfoundationforparkinsons.org/uploads/1/3/0/2/130288709/130288709.html#what+teams+have+won+the+last+10+super+bowls PDF link annotation
    • http://myautoaccidenthelp.com/uploads/1/3/0/6/130639739/f6fa86ab72a1.pdfIn PDF document text
    • http://www.compassionatecanines.org/uploads/1/3/0/6/130603941/waruxez_wuwud.pdfIn PDF document text
    • http://limitlesspt.com/uploads/1/3/0/8/130813888/50418b.pdfIn PDF document text
    • http://blubloggs.com/uploads/1/3/0/3/130323647/zesovuro-bujisobe-bumig-wasubetafozo.pdfIn PDF document text
    • http://sojourninghearts.com/uploads/1/3/0/9/130968997/noxuxevamivewawobudu.pdfIn PDF document text
    • http://elliecooper.com/uploads/1/3/0/4/130483856/09938f231.pdfIn PDF document text
    • http://miss-stevens.com/uploads/1/3/0/5/130589156/kumilakozokozuwo.pdfIn PDF document text
    • http://therivercharleston.com/uploads/1/3/0/2/130272571/6139433.pdfIn PDF document text
    • http://clemsonumc.net/uploads/1/3/0/4/130476135/bafaporiparik-vavuxeretetovir-lopuperike.pdfIn PDF document text
    • http://www.derekslawnandlandscaping.com/uploads/1/3/0/7/130738739/5120793.pdfIn PDF document text
    • http://adventurerltd.com/uploads/1/3/0/7/130739006/1030297.pdfIn PDF document text
    • http://mta-sts.mx.besomeoneco.com/uploads/1/3/0/9/130969375/banuwer_febefejatin.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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C83 7852 bytes
SHA-256: 404d89b30c73f9042e5dfe0529bef8bcdad7bd1d4246d53e6b93f78f46c37883