Malicious PDF — malware analysis report

Static analysis result for SHA-256 353596ee828fc03a…

MALICIOUS

PDF

91.6 KB Created: 2021-06-28 23:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 59fb798772ccd9edea078a3b4e10254a SHA-1: bae0c469e4940d981553c5303664e17312564748 SHA-256: 353596ee828fc03a6ec6e5915654dc8d2b9bdd1a065c479dde00ef7fdb92cf35
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The document body is heavily obfuscated and unreadable, but the presence of numerous external URIs and the heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://cructi.ru/uplcv?utm_term=how+to+draw+step+by+step+animals PDF link annotation
    • http://coinproject.com/userfiles/image/file/vopitiwulujixetusafik.pdfIn PDF document text
    • http://integrotech.com/zdjecia/file/34956932279.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca49dbbb73---xaxixofafawevenex.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/601035c5029bce01d3e6847149b0e11a/zagosodagosokaxikozirido.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1609d18d94f19e---refilubomopugo.pdfIn PDF document text
    • http://gphs84.com/clients/866382/File/77848482887.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160c1480ba585a---3097097871.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b463a59354e---55992970333.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/69krdr2bp9t7g21mjr38titqd0/12844025848.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8e78e4f22---datos.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/6949096bbed9cd6e27e44a416d595735/pibado.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/lqp8ophfd3pionv5q4t0ikvas2/12126678281.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/6556ba706395c8dcccc0ab1b0ab4f5a8/getunolalopopa.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/lutanikikesorojebab.pdfIn PDF document text
    • https://mollis.rs//files/88292940719.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/i4bfbj9jml3t2mpjm90nr05946/99240501991.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/58f68528953d0b1f82c9010cde952e00/gewirotiwelavofi.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6fac11acd4115e0da6e13ae85cd753dc/podizite.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3e57d1ad5---98599552339.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160816a5556615---gomozofademotipapuwop.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/jekemikutisore.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c30ee99e848---libepirowumegegibaraduvad.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/lemonoketotavukoxoxif.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/50371135225.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/89009nqr99ci4rnaim03l4gj87/79082501284.pdfIn PDF document text
    • https://lemanssrl.it/file/purotopebuwonu.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
    • 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_off000101e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F8 17608 bytes
SHA-256: b93a2df361d65f44ffd5f63748c6122e81a6b8c9ec004d9a547cec1254aee7d8
font_02_sfnt_off000147d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D1 10884 bytes
SHA-256: 31125782949c332a405327ef3b704ec4e290ff7f2cd9f7dab8c24a2e434882cc