Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd8c3b75acea74d…

MALICIOUS

PDF

75.1 KB Created: 2021-10-11 08:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: edd12eb88cf32cc18667711299e1a26a SHA-1: 978debe48b7a3908ff10ac309a9e0d024f4d91a2 SHA-256: 3dd8c3b75acea74dc0d523a666d303b2ceb2d2ff0ac9f50d2d52354774501c71
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://2990592.ru/ckfinder/userfiles/files/legafumajaxobigipuwo.pdf In PDF document text
    • http://roseeskin.com/userfiles/file/20210929151631.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/xejawogarivifipigesebup.pdfIn PDF document text
    • http://studiocinti.eu/userfiles/files/loponuba.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210914043736251.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615e8460f1479---bororive.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/10124284064.pdfIn PDF document text
    • https://semut73.com/contents/files/91284565305.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-30/20210930160828347019.pdfIn PDF document text
    • http://leruichem.com/upload/files/34965323011.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/devumerobipimera.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/sopemi.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/sogij.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021102163247479.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/xibuzerepan.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/ebe4ae2c697fd84467f22c234f28651e/92082088866.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/safunepawizu.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/25077365645.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/1483720363.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615d59f3d290c---vodibofekajejegesopozezek.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/jonumojokajo.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/gozitelolexotesobozigo.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/i2kqtk96tm9nknqudq264selga/31151423169.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/66559596461.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=predict+malayalam+meaningPDF 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_off0000c23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23A 17364 bytes
SHA-256: 8fa0e8cb2d5453500cb33934c0c8662e5796bda1148ea277c5e2da960d2faf53
font_01_sfnt_off0000ee90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A7 10540 bytes
SHA-256: 70bc7933b2f41cb8072ddd0260b68745e7cc499d296af09f0af7563b2603322f