Malicious PDF — malware analysis report

Static analysis result for SHA-256 15609e09159d2b9e…

MALICIOUS

PDF

49.6 KB Created: 2020-03-12 01:49:03 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 44534acc11a45a456dad31acc52037e7 SHA-1: c866dc6fbcbfa7111dabe91a3e41b73dd25485a9 SHA-256: 15609e09159d2b9eb059379513f7b2e0cfd63d7e6fe9533abfe226ef7e0cee9f
136 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a link farm or phishing lure, containing numerous embedded URLs pointing to suspicious domains. The ML classifier strongly indicated maliciousness, and heuristics identified a mass external PDF link farm and suspicious invisible links. While no scripts were directly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://mta-sts.jhigh18.com/uploads/1/3/0/6/130621832/130621832.html#matlab+neural+network+xor+example PDF link annotation
    • http://aznursingresources.com/uploads/1/3/0/5/130543052/5147642.pdfIn PDF document text
    • http://office-ssl-secure-management-portal-8d093184ceb1a5718fe6.online/uploads/1/3/0/8/130813448/a97fa1926.pdfIn PDF document text
    • http://nqxr.com.au/uploads/1/3/0/5/130551341/6764041.pdfIn PDF document text
    • http://blockchaintradingllc.com/uploads/1/3/0/6/130604203/2093480.pdfIn PDF document text
    • http://thecloudmen.com/uploads/1/3/0/4/130483279/8275129.pdfIn PDF document text
    • http://adriancc.org/uploads/1/3/0/4/130435712/8143507.pdfIn PDF document text
    • http://stellarosemarywalling.com/uploads/1/3/0/5/130550882/garitubudal.pdfIn PDF document text
    • http://xingkongqipaiguanwang.br3h.com/uploads/1/3/0/8/130874482/054603af6596.pdfIn PDF document text
    • http://mail.exhibitsourceinc.com/uploads/1/3/0/6/130639024/4611822.pdfIn PDF document text
    • http://crownprosperityllc.com/uploads/1/3/0/5/130589331/divutoxu.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B00 9524 bytes
SHA-256: 8d67afc02a8083452a9995dfc131a85e6243f304ab0f66e94ea133fd70d352c6
font_01_sfnt_off0000af21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF21 2920 bytes
SHA-256: 009232a8a09263d45ea36fd54c3e95152ea0c2e67ff8d286fb1346050b5b482a

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