Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf6d3dc19c1a444…

MALICIOUS

PDF

50.3 KB Created: 2020-03-17 16:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 89af4bcf9724a45f864f0837e4f17aa6 SHA-1: 2c093c28f29f989aa0cbc1d332a289a37e57b511 SHA-256: 3bf6d3dc19c1a4442ff282f01d2e06e55974b1332f6e1174d753c90f79a4200f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Normas apa para hacer un ensayo a mano' and mentions wkhtmltopdf, suggesting a lure for academic or research-related content. The primary attack pattern involves directing users to a vast network of linked PDF files hosted across numerous domains, likely for SEO spam or to distribute further malicious content.

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://smokin.tires/uploads/1/3/0/3/130312964/130312964.html#normas+apa+para+hacer+un+ensayo+a+mano PDF link annotation
    • http://more2dance.com/uploads/1/3/0/6/130640220/5934779.pdfIn PDF document text
    • http://theswishradio.com/uploads/1/3/0/4/130488583/jowaked-xuduzusa.pdfIn PDF document text
    • http://theyellowvanfurnitureco.com/uploads/1/3/0/4/130476412/xenomigi.pdfIn PDF document text
    • http://hostmaster.haakshout.nl/uploads/1/3/0/3/130324227/04d448ee9fed.pdfIn PDF document text
    • http://smserving.com/uploads/1/3/0/4/130488063/b3275233e36.pdfIn PDF document text
    • http://www.agro-spezial.com/uploads/1/3/0/2/130272472/gukajuwekuwuwo-xasile.pdfIn PDF document text
    • http://mail.rubycopper.vn/uploads/1/3/0/7/130739558/dovavekoja.pdfIn PDF document text
    • http://divyanshuabhellochandaniii.com/uploads/1/3/0/7/130775537/dowivavepiborik_xiduvuto_xewil_lirobisovona.pdfIn PDF document text
    • http://www.pattyannes716.com/uploads/1/3/0/6/130639705/rosepolu.pdfIn PDF document text
    • http://www.jhpage.com/uploads/1/3/0/4/130476060/bukimagolusu.pdfIn PDF document text
    • http://streetbrunch.com/uploads/1/3/0/6/130604240/3028769.pdfIn PDF document text
    • http://bodytalksouthdakota.net/uploads/1/3/0/2/130288406/3419938.pdfIn PDF document text
    • http://nononsensehomeinspection.com/uploads/1/3/0/4/130491852/gelurobonivesu.pdfIn PDF document text
    • http://datumdesignstudios.us/uploads/1/3/0/2/130289731/377fbdd.pdfIn PDF document text
    • http://cemsinternational.com/uploads/1/3/0/4/130483770/biwupowuxiw-maligajuf.pdfIn PDF document text
    • http://dsabids.com/uploads/1/3/0/7/130739265/jifomikoxowibe.pdfIn PDF document text
    • http://www.tulsaweldingcompany.com/uploads/1/3/0/4/130436094/vujuxumaxowapenevi.pdfIn PDF document text
    • http://mx.timelytresses.com/uploads/1/3/0/5/130540240/xolewababaw.pdfIn PDF document text
    • http://sacredcirclecounseling.com/uploads/1/3/0/7/130739727/nifam_gurab.pdfIn PDF document text
    • http://www.tanyahammond.ca/uploads/1/3/0/4/130490218/5600512.pdfIn PDF document text
    • http://glasswhims.com/uploads/1/3/0/3/130313582/26bc587f8f213da.pdfIn PDF document text
    • http://globelend.net/uploads/1/3/0/6/130621006/7bba9da7e9c44d.pdfIn PDF document text
    • http://www.taiwancarparts.com/uploads/1/3/0/6/130639450/5447609.pdfIn PDF document text
    • http://brisbanenutrition.com/uploads/1/3/0/2/130289317/6108223.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
🗂 Part of campaign: globelend.net 4 samples

Related samples 8

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_off00008311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8311 9476 bytes
SHA-256: 777552632778c8947a967911d05c4f6313d90172b441de8628a0575269cf56fe
font_01_sfnt_off0000a58d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA58D 16204 bytes
SHA-256: f31c439e28d0137206b91a151f21343900f846ed9ff070250fbe82eb1cc7da1d

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