Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cb3afcedf799ce0…

MALICIOUS

PDF

43.2 KB Created: 2020-03-07 23:02:14 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 3f25bd5a6825eb6434277e14f9a7a64b SHA-1: 052cd6c74e1b8071296431e80e811e5e6fb8b78e SHA-256: 3cb3afcedf799ce0a035c42e541c1495b8cf26ba02e1d27970219e1721a9afe1
96 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, indicating a link farm or SEO manipulation tactic. The primary heuristic firing, PDF_SEO_LINK_FARM, confirms this behavior. While no scripts were extracted, the sheer volume of outbound links suggests a malicious intent to redirect users to potentially harmful websites or to artificially inflate search engine rankings. The document body itself is heavily obfuscated and contains metadata that does not provide clear user-facing 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://cwacivilconstruction.com.au/uploads/1/3/0/4/130483811/130483811.html#heart+disease+care+plan+nursing PDF link annotation
    • http://saampradaayasaahiti.org/uploads/1/3/0/5/130543488/9059983.pdfIn PDF document text
    • http://museumeats.com/uploads/1/3/0/7/130738499/4707d3ff.pdfIn PDF document text
    • http://miamilegalcenter.com/uploads/1/3/0/7/130738679/gureboz.pdfIn PDF document text
    • http://alex-tips.net/uploads/1/3/0/7/130776781/230fc6ff9beef.pdfIn PDF document text
    • http://bearsvsbabiesgame.org/uploads/1/3/0/5/130543543/62e5a9bcf41.pdfIn PDF document text
    • http://mx.jessicaraeanderson.com/uploads/1/3/0/2/130270826/mupunezewudu.pdfIn PDF document text
    • http://theparksphysie.com/uploads/1/3/0/4/130483499/rojavurerosak.pdfIn PDF document text
    • http://tempdev.online/uploads/1/3/0/8/130813592/xegimus_mamejinametu.pdfIn PDF document text
    • http://joyofsyntax.com/uploads/1/3/0/5/130590770/6769557.pdfIn PDF document text
    • http://zeeshanbaig.com/uploads/1/3/0/9/130969212/vosusovipemab-kuxapotopakolin-senowowavitujo-govoroku.pdfIn PDF document text
    • http://artcenterlosangeles.org/uploads/1/3/0/2/130289550/zexuze-mubavula-barenamof-gikubu.pdfIn PDF document text
    • http://4streets.org/uploads/1/3/0/5/130590351/1fa5658.pdfIn PDF document text
    • http://www.capoeirabayonne.com/uploads/1/3/0/6/130621663/c96c9259.pdfIn PDF document text
    • http://partocica.com/uploads/1/3/0/4/130488816/8d1d5ad93ad7277.pdfIn PDF document text
    • http://auto-aero-investments.com/uploads/1/3/0/7/130738732/d85b24de3.pdfIn PDF document text
    • http://strategicleadershipmastery.com/uploads/1/3/0/2/130289652/8762424.pdfIn PDF document text
    • http://hostmaster.berlinerbibelschulen.org/uploads/1/3/0/6/130639166/6eef4f8cc5821f.pdfIn PDF document text
    • http://mawilabs.com/uploads/1/3/0/5/130540507/9800af21.pdfIn PDF document text
    • http://pjocib.bdgct.com/uploads/1/3/0/8/130874529/1886050.pdfIn PDF document text
    • http://treeoflifepsychotherapy.com/uploads/1/3/0/4/130435581/6f91c54.pdfIn PDF document text
    • http://chrissyroth.com/uploads/1/3/0/5/130551125/0f3863b3ac0e75.pdfIn PDF document text
    • http://cdrecord.com/uploads/1/3/0/6/130639628/xewexowot_ridepomadulen.pdfIn PDF document text
    • http://jaspermarianek.shop/uploads/1/3/0/5/130551258/e35af4b5fac2.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 6

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_off000080ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CE 7880 bytes
SHA-256: 43f58e9b44c320a57530e272666d8acd365a2fb9f900f1ca347078c783cd0ac6

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