Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c72feeb09ebf6d8…

MALICIOUS

PDF

41.8 KB Created: 2020-03-14 13:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: b6fe5b9f743afefe7073aede6e3b4b12 SHA-1: f5e5cfae8f038a4ad84cb6675afb5f5b93b751ea SHA-256: 1c72feeb09ebf6d89ed52e1df519eceba439170092de71a7d191d8fe1974ab2a
96 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern appears to be directing users to a vast network of external URLs, likely for SEO spam or to host further malicious content. No scripts were extracted from this sample.

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://huangguanxianjinwangam8m.br3h.com/uploads/1/3/0/6/130604492/130604492.html#the+awkward+yeti+heart+and+brain+pdf PDF link annotation
    • http://colleenchristmanmusic.com/uploads/1/3/0/7/130776262/wifigexavum-zezef-banivurejuru-kekazab.pdfIn PDF document text
    • http://a1985165xstreamtravel.xsideas.com/uploads/1/3/1/0/131069991/malatu.pdfIn PDF document text
    • http://clearviewrentalproperties.com/uploads/1/3/0/4/130476347/wisoma.pdfIn PDF document text
    • http://wallgears.com/uploads/1/3/0/6/130620503/5183804.pdfIn PDF document text
    • http://cleaalsip.com/uploads/1/3/0/6/130604956/fowovuxusetiwikuv.pdfIn PDF document text
    • http://www.rumanabrowdesign.com/uploads/1/3/0/7/130775215/8250163.pdfIn PDF document text
    • http://miguel-castro.com/uploads/1/3/0/4/130488096/pabiwejopoxuvej_bazisabewivik_vesexuxajoduxu.pdfIn PDF document text
    • http://nailartgallery1.com/uploads/1/3/0/6/130604694/xixazaf-malowitekimupib-kudepafajimo.pdfIn PDF document text
    • http://p2pprotect.com/uploads/1/3/0/5/130588633/moburisebobajat.pdfIn PDF document text
    • http://chrissdiaz.com/uploads/1/3/0/7/130738940/zozakuwavibe.pdfIn PDF document text
    • http://meredithbirrell.com/uploads/1/3/0/6/130604589/rivirawevedex-dazelezajutube.pdfIn PDF document text
    • http://brunostippe.com/uploads/1/3/0/5/130589286/guzanuvisopup.pdfIn PDF document text
    • http://moritzscience.com/uploads/1/3/0/7/130738894/fexawozijuges.pdfIn PDF document text
    • http://theschoolofrevival.org/uploads/1/3/0/2/130274338/6709162.pdfIn PDF document text
    • http://mta-sts.mail.privateselectours.com/uploads/1/3/0/9/130969825/xiponomarodar_retumapaxi_wivaniredojenir.pdfIn PDF document text
    • http://www.hillyarddesign.com/uploads/1/3/0/7/130775834/garuvufifipojudiw.pdfIn PDF document text
    • http://mlotero.net/uploads/1/3/0/6/130639327/laxewemevolalu_tevimiz_tuvojeki_pokinem.pdfIn PDF document text
    • http://mail.northlightonline.com/uploads/1/3/0/5/130588597/e6f4627f44e0.pdfIn PDF document text
    • http://leadershipdirectoryjwc.org/uploads/1/3/0/5/130539297/05fba.pdfIn PDF document text
    • http://ocmunc.com/uploads/1/3/0/6/130603721/6e5620c62.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77FA 8832 bytes
SHA-256: 4b1e422597aaf776c3b85c203452a442b10ad3ef7bee31face604af84ae03348

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