Malicious PDF — malware analysis report

Static analysis result for SHA-256 68810bcd1fa17c2a…

MALICIOUS

PDF

45.8 KB Created: 2020-03-18 18:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: c8b721dfede81be93b1bff4babff9e86 SHA-1: 84e365290f5dff3ac35d665c22d76beb337320df SHA-256: 68810bcd1fa17c2aeb45f1e82e31f071c67612625d70a9282e21e78fd1bdaae7
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for JavaScript execution or further redirection to malicious sites.

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://blacktreelofts.com/uploads/1/3/0/6/130604667/130604667.html#cuales+son+las+partes+de+un+polinomio PDF link annotation
    • http://inspiroihu.com/uploads/1/3/0/6/130620603/sefepopuka_xejijezow_wemanirasugif.pdfIn PDF document text
    • http://aptaussieshome.com/uploads/1/3/0/6/130603692/571367.pdfIn PDF document text
    • http://www.loudesigns.net/uploads/1/3/0/7/130775701/5901539.pdfIn PDF document text
    • http://bcroofingcompany.com/uploads/1/3/0/7/130775806/nemed.pdfIn PDF document text
    • http://www.lovebotanical.com/uploads/1/3/0/7/130738578/kejagimesofufub.pdfIn PDF document text
    • http://www.iteachbydesign.org/uploads/1/3/0/2/130271240/92bc2e1d3f965af.pdfIn PDF document text
    • http://listborg.net/uploads/1/3/0/4/130476502/nutiderububiwomupo.pdfIn PDF document text
    • http://kkompani.com/uploads/1/3/0/3/130312980/6f4a3.pdfIn PDF document text
    • http://3505brunell.com/uploads/1/3/0/7/130776649/dizalatulajefot.pdfIn PDF document text
    • http://damorse.com/uploads/1/3/0/6/130603944/sedene-jefamovalir.pdfIn PDF document text
    • http://www.genzmktg.com/uploads/1/3/0/6/130620280/c16219f6e82.pdfIn PDF document text
    • http://www.letschocolati.in/uploads/1/3/0/6/130604148/15921bb4d830.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://www.adobe.com/).NotoIn PDF document text
    • http://www.google.com/get/noto/http://www.adobe.com/type/ThisIn PDF document text
    • http://scripts.sil.org/OFLNotoIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: aikhme.com 3 samples

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C8 8688 bytes
SHA-256: 0227f81ba6fddaad1c6f50f5d182420eba8f2a09777806779e488aabe00a00ea
font_01_sfnt_off00008532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8532 4144 bytes
SHA-256: 885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da
font_02_sfnt_off00009228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9228 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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