Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2bc026128e1c3d…

MALICIOUS

PDF

84.9 KB Created: 2021-07-03 10:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 968451f018d8acf3c9d6272c14c0dc21 SHA-1: b7b19d80401da152d3cff1eb5112f3b84e13fa75 SHA-256: 4f2bc026128e1c3dc7506d5a1207422da3e042bab419d994db1ea3710ba563b3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high number of external links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and numerous links suggest an attempt to host or distribute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://whscardinals1963.com/clients/9/9e/9e5fab02d16e7113a74bdd4e7828f974/File/9187476370.pdf In PDF document text
    • http://bbfederico2.net/userfiles/file/29810831852.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba18f897b74---33764629569.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986832663fc---rejowizamabikomag.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/97278014543.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160712deba53ef---73833577799.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090ddc03ca35---xetesufajakimuvodilutuso.pdfIn PDF document text
    • https://mmszke.hu/files/file/bofebegufopilinefuwez.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/begajepikekozevufege.pdfIn PDF document text
    • http://luatsubienhoa.com/upload/ck/files/vapefexofisadoxu.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/kagemad.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/7719e5c0a1183a7c437432f57285855c/mifaweropo.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c76c5b3d446---74426804668.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/57097844196.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/cd497b56e666d8c5f8a8647aec00946a/tovuvegowivexuzevubi.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210613063043.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784be6d4ff5---45728696651.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210510050750.pdfIn PDF document text
    • http://williamshudson.org/clients/3/35/35bf74ce48b5c120232fd40fb4fe3e45/File/fesuviledufoxas.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/kilexumenonagafol.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/c019501c9b44bf7fc9031c43a7256079/lukolaxekikimemepuz.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-5/file/lilunataxane.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/c761e5f42d0b6496277d6a05332f3890/lovutafiwo.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-06-05/images/files/zudatorobulikinifidegugi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=persona+5+classroom+answersPDF link annotation
    • 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 16616 bytes
SHA-256: a4dd1bcbbb94cfe2ee3b69b2460c6a00646599c7503a6327bd4911510d0d14cc
font_01_sfnt_off000116b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECC 10424 bytes
SHA-256: 5a30a75f1a5b5b6ff77c700fc0aacba2efe02e0be32f157a6341f0353d75e472