Malicious PDF — malware analysis report

Static analysis result for SHA-256 251fdb17ab525281…

MALICIOUS

PDF

35.6 KB Created: 2020-03-29 09:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: 996a0636486f5e309f015882fe7a5dc6 SHA-1: 087889657274269369a7452fba40b6148801dca4 SHA-256: 251fdb17ab52528193ad27c7e494e1c7cae5805b909fa30564a0b5196e77aa15
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a network of websites, 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://pameladirnberger.com/uploads/1/3/0/3/130379315/130379315.html#c+program+to+sort+list+of+strings+using+pointers PDF link annotation
    • http://www.mastiffroyalty.com/uploads/1/3/1/0/131071210/zodufuzurum.pdfIn PDF document text
    • http://ymaengineering.com/uploads/1/3/0/5/130550882/4fc8273ad9a.pdfIn PDF document text
    • http://dissociationofminds.com/uploads/1/3/0/5/130590241/xujagi-wexabetaz.pdfIn PDF document text
    • http://dragonsky.org/uploads/1/3/0/6/130605399/7728432.pdfIn PDF document text
    • http://www.mftmb.com/uploads/1/3/0/7/130740049/livufodobagubamija.pdfIn PDF document text
    • http://crabapplecovefoundation.com/uploads/1/3/0/7/130739664/2102539.pdfIn PDF document text
    • http://neo-water.net/uploads/1/3/0/5/130551907/8045959.pdfIn PDF document text
    • http://www.christineemmonsphd.com/uploads/1/3/0/7/130739316/8348869.pdfIn PDF document text
    • http://tjpmealprep.com/uploads/1/3/0/5/130588735/vatirikusufozetuwa.pdfIn PDF document text
    • http://longrichproductuae.com/uploads/1/3/1/4/131410227/6883286.pdfIn PDF document text
    • http://mylsathouse.com/uploads/1/3/0/7/130738971/derufikinakipul.pdfIn PDF document text
    • http://beleeflaos.be/uploads/1/3/0/6/130639331/c4ecdbd791.pdfIn PDF document text
    • http://liftuplab.com/uploads/1/3/0/2/130287845/sipazodukiwi_wezowivakebo_pusize.pdfIn PDF document text
    • http://seariderphotography.com/uploads/1/3/0/5/130540182/nuzeg.pdfIn PDF document text
    • http://sunoband.com/uploads/1/3/0/6/130604467/de463b386770.pdfIn PDF document text
    • http://www.mallardthenovel.com/uploads/1/3/0/2/130288498/a735ac605.pdfIn PDF document text
    • http://civilwarlady.org/uploads/1/3/0/6/130621100/kifidovoxagogo_rirug_digepamo.pdfIn PDF document text
    • http://dc-a61ca1f11fd7.theboutiqueoz.com/uploads/1/3/0/7/130776828/ae0ce549d.pdfIn PDF document text
    • http://brandingfaithdesigns.com/uploads/1/3/0/2/130287882/8633269.pdfIn PDF document text
    • http://www.dev2.dylankirby.com/uploads/1/3/0/6/130639605/7792466.pdfIn PDF document text
    • http://1southdearborn.com/uploads/1/3/0/6/130621134/704721.pdfIn PDF document text
    • http://www.everythingkoze.com/uploads/1/3/0/7/130775666/jadofut.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 3

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_off00006119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6119 8108 bytes
SHA-256: bd6b604dbfd8e331d39c4aeb948a2ee62a0af31ae1b0df491cd347b435cee0be

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