Malicious PDF — malware analysis report

Static analysis result for SHA-256 4136a2aa6a4112c0…

MALICIOUS

PDF

142.0 KB Created: 2020-03-23 09:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 51ff72e2b2d9bbc99f339f7eee1e4c63 SHA-1: b963c806ab74b1e47bda86e38cf23e5bd0900f06 SHA-256: 4136a2aa6a4112c0118fa377d0d24fafc53dbd26c4e060a5add8e7c0442697b0
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on various domains. This pattern is indicative of a link farm or a mechanism to distribute further malicious content. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the primary purpose is to generate traffic or host a collection of malicious documents. No scripts were extracted, limiting the ability to determine a more specific payload or family.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://blessingdesign.org/uploads/1/3/0/2/130287367/130287367.html#que+es+reproduccion+de+las+plantas+wikipedia PDF link annotation
    • http://jtmarketingsvs.com/uploads/1/3/0/5/130539979/zujiteduzudelojane.pdfIn PDF document text
    • http://www.rlassociates.net/uploads/1/3/0/4/130435843/832fe249c.pdfIn PDF document text
    • http://alphaclothing.online/uploads/1/3/0/4/130483232/811f4fac84ab.pdfIn PDF document text
    • http://ipads.buchananschools.com/uploads/1/3/0/4/130435684/kojovutowufateg_revopesezol_talaxawilisu.pdfIn PDF document text
    • http://gnhpa.com/uploads/1/3/0/2/130270823/fuvekupaviroduvigu.pdfIn PDF document text
    • http://uniquehousebuyers.net/uploads/1/3/0/6/130621789/fimibov.pdfIn PDF document text
    • http://sucre.de/uploads/1/3/0/3/130313613/fimutopigaso.pdfIn PDF document text
    • http://sunnyonthemic.com/uploads/1/3/0/4/130483767/8108360.pdfIn PDF document text
    • http://www.freedfromsatan.com/uploads/1/3/0/3/130313180/5332995.pdfIn PDF document text
    • http://mintparents.com/uploads/1/3/0/4/130476499/5196518.pdfIn PDF document text
    • http://gottimber.com/uploads/1/3/0/6/130604136/368734.pdfIn PDF document text
    • http://alovingwelcome.com/uploads/1/3/0/3/130323723/gefagozebok.pdfIn PDF document text
    • http://todotodid.com/uploads/1/3/0/7/130775098/207c87cd8482.pdfIn PDF document text
    • http://melissascreatablecreations.store/uploads/1/3/0/7/130739258/zilixumorepodanoz.pdfIn PDF document text
    • http://thebestteams.org/uploads/1/3/0/5/130590545/0cd9bac595c97a.pdfIn PDF document text
    • http://www.joes-auto-detailing.com/uploads/1/3/0/6/130639406/bebim.pdfIn PDF document text
    • http://www.paintballinkorea.com/uploads/1/3/0/5/130588616/4012208.pdfIn PDF document text
    • http://gelmai.net/uploads/1/3/0/8/130873930/b10edd2.pdfIn PDF document text
    • http://www.sidewithstan.com/uploads/1/3/0/4/130436171/4931958.pdfIn PDF document text
    • http://lilogisticscenter.com/uploads/1/3/0/5/130546283/kanat-temit-lilam.pdfIn PDF document text
    • http://glogalbrand.com/uploads/1/3/0/5/130589452/61fe9cab9.pdfIn PDF document text
    • http://segabnb.com/uploads/1/3/0/8/130874670/mamereg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001dcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCB7 12528 bytes
SHA-256: fdf4c5b22ad7016cb6e528e3e66568932339a9ae42ffcdce48dc209ba901d5c1
font_01_sfnt_off0002066f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2066F 2944 bytes
SHA-256: e8d2acff96767f728aead9cdf9b70fb59902ae4d139d021ebf8e0accf5e349f7
font_02_sfnt_off000210d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210D9 16084 bytes
SHA-256: b47abd168e13b0b9cb3acc4595dcc359ab436e90ff40105f2cc83f6817948f69

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