Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae6c870587e6bcc1…

MALICIOUS

PDF

42.7 KB Created: 2020-06-20 14:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 69ee9c67d6a0424637a068df9f22e634 SHA-1: 46e45d675885b0f99d88045ab188afbae01d5b3d SHA-256: ae6c870587e6bcc1b5c6283c46951cbabc47bfa1413193acf561131f3640d458
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document is designed to appear as free worksheets for Spanish teachers, but it functions as a link farm. It contains numerous external links to PDF files hosted on various domains, likely intended to drive traffic or distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a deceptive SEO or traffic-driving scheme.

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://bellebaeuk.com/uploads/1/3/0/5/130550903/130550903.html#free+worksheets+for+spanish+teachers PDF link annotation
    • http://mta-sts.mx.dinahsdreams.com/uploads/1/3/1/3/131383737/jatatuzabelobolagi.pdfIn PDF document text
    • http://bishophollymission.org/uploads/1/3/0/5/130589413/6775779.pdfIn PDF document text
    • http://cayugacutups.org/uploads/1/3/0/5/130551051/100c8.pdfIn PDF document text
    • http://rockthedam.net/uploads/1/3/1/6/131606368/lujetu.pdfIn PDF document text
    • http://egowheelchair.com/uploads/1/3/0/5/130588297/1492989.pdfIn PDF document text
    • http://exchange19.ccfiji.com/uploads/1/3/0/7/130774964/7610354.pdfIn PDF document text
    • http://slick2shine.com/uploads/1/3/1/8/131856402/652f51c4e57bdb8.pdfIn PDF document text
    • http://cleanpro888.com/uploads/1/3/0/5/130544872/2513962.pdfIn PDF document text
    • http://webdisk.chicagotrainingcenter.org/uploads/1/3/1/1/131164160/wibudizifiwijig.pdfIn PDF document text
    • http://host5.celestecorp.com/uploads/1/3/1/1/131164097/jirukone_xevojexitirorat_figapuxizok.pdfIn PDF document text
    • http://sultanalthani.com/uploads/1/3/0/3/130324289/sukojovaruxekotoj.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_off000069e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69E3 4968 bytes
SHA-256: ccc11221d66172cb94e261835c6acc2c1d56f5f70f31c8cc09e48e2e686d425b
font_01_sfnt_off00007ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD2 10600 bytes
SHA-256: e5cb41dc960dec82dfceddec4347eb9356d04a7d8a59f447188cbfd8f215cdc5