Malicious PDF — malware analysis report

Static analysis result for SHA-256 4856cca47c1de99e…

MALICIOUS

PDF

43.0 KB Created: 2020-03-27 11:43:52 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 87cf6ad35617cbc6b8a94515a7db146e SHA-1: b5054a772246539f8036208866caa921ea48a168 SHA-256: 4856cca47c1de99e07b43d96a264e2dd1a58c283845a3320036deb4bb8db29de
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are dynamically generated and point to various domains. The document body includes a "convert decimal to binary online" lure, suggesting a phishing or SEO spam campaign. The heuristic firings indicate this is a link farm designed to drive traffic to numerous external PDF files and HTML pages. 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://edgelandscapeandmaintenance.com/uploads/1/3/0/4/130476045/130476045.html#convertir+numeros+decimales+a+binarios+online PDF link annotation
    • http://www.brconcept.fr/uploads/1/3/0/3/130313091/kunixinuxa_mejotaget_fuvajiletamitin.pdfIn PDF document text
    • http://rfjobstoday.com/uploads/1/3/0/8/130813325/bofiwogejix-wiwevupilaguz-folinalafu-fugowokixutij.pdfIn PDF document text
    • http://www.case-backhoe.com/uploads/1/3/0/4/130489052/tusimuxuwit-nimawezajep-nitifiti.pdfIn PDF document text
    • http://free-tanga.com/uploads/1/3/0/6/130603858/8169180.pdfIn PDF document text
    • http://danygyrltreasures.com/uploads/1/3/0/2/130272644/rulekewozob.pdfIn PDF document text
    • http://sacredsummitchocolate.com/uploads/1/3/0/7/130775768/4918235.pdfIn PDF document text
    • http://kristinasteward.com/uploads/1/3/0/5/130590763/6239389.pdfIn PDF document text
    • http://erisports.net/uploads/1/3/0/6/130639214/1734898.pdfIn PDF document text
    • http://e-techbooks.com/uploads/1/3/0/4/130435574/vururikoxu.pdfIn PDF document text
    • http://msmariecrafts.com/uploads/1/3/0/7/130739156/5287437.pdfIn PDF document text
    • http://stdesignmatters.com/uploads/1/3/0/7/130738662/7114727.pdfIn PDF document text
    • http://delmontesupport.com/uploads/1/3/0/2/130287852/6073902.pdfIn PDF document text
    • http://mta-sts.fccwinder.org/uploads/1/3/0/7/130739324/fukisaxe_linazizitoxivu_vijularuruz.pdfIn PDF document text
    • http://autonotraffic.com/uploads/1/3/0/7/130739301/6964047.pdfIn PDF document text
    • http://drozpsychology.com/uploads/1/3/0/4/130435893/e3ec0e5dc1f.pdfIn PDF document text
    • http://wilsoninteriordesign.com/uploads/1/3/0/5/130538986/mobowafojokef_rapalag.pdfIn PDF document text
    • http://schreckdevelopment.com/uploads/1/3/0/5/130543538/rukebimawavovetovib.pdfIn PDF document text
    • http://restaurantatburdicks.com/uploads/1/3/0/7/130739696/4746720.pdfIn PDF document text
    • http://trixiekitty.com/uploads/1/3/0/7/130775198/1247636.pdfIn PDF document text
    • http://misogi0001.com/uploads/1/3/0/2/130288753/repuwelotekipotid.pdfIn PDF document text
    • http://ecuadoroscuro.com/uploads/1/3/0/5/130588568/zaresija_pejolikejos.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 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_off00007303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7303 8828 bytes
SHA-256: 2fde0eae2f0c1712f4ade6fabae26984dc487d74d334fd566b0e3e2c3fbf64f0
font_01_sfnt_off000092b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92B9 2000 bytes
SHA-256: a1600c79331cba21b3b4a1f056a9d989f02b1280d9db796053b5096bff0b23f3

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