Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bca1801cb1abd54…

MALICIOUS

PDF

71.7 KB Created: 2021-07-02 02:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 098d773f2693acf710a3a847e2241d03 SHA-1: f9ce7bffe1301dbda22e1627ead46791c87ea646 SHA-256: 5bca1801cb1abd54e6c91735a5eb8363a9b30519f27d7d48bb3759dd56f7c448
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://queure.ru/uplcv?utm_term=1+thessalonians+5 PDF link annotation
    • http://carrozzeriabosini.net/userfiles/files/13195830494.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c24874c010.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/4263528510.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/b4980819f9afcc11100cd0d225759658/bivuli.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4a51a05ed---funipukogajagute.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/330qg3c39d0mqsdkib2jubsh9f/fejovomizorijoto.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/82d62b69a45fd410b88a9dfe61295408/melatu.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/75295954559.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609889620759f---14861644232.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/0ccfe0529054c9d0737dbaa1a4e8e4c9/zuruvu.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160941371394af---vifepajen.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/9605ecea6f723300d7a9436291b9b74f/fazirup.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddb6f62535---25356627873.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8m9jcq7f6hvvl6pv8j607rgfm4/luzuvikepijegasumeja.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/66965905405.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/59314073334.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/34167684464.pdfIn PDF document text
    • http://techbis.pl/files/file/pufid.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0caa7405---lubatojenobi.pdfIn PDF document text
    • https://renault-service.com/userfiles/13480456303.pdfIn PDF document text
    • https://nasikampung.info/contents//files/53020703045.pdfIn PDF document text
    • http://ohsclassof73.com/clients/9/9a/9a21b0b253f7c4eafe662346d237c286/File/dawuligibifulen.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/7jddtkrqoaqntn9o432h1am5qi/46177502785.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_off0000bb59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB59 15420 bytes
SHA-256: 4c62181374e98f8b51dc725ed64bd8a3e7ee99a5e60da298871846915f40e872
font_01_sfnt_off0000e2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D1 10192 bytes
SHA-256: e41f415ee920bc15437d1ccd9ff423e713833f3bbfb5a0bb6b4d854801929fea
font_02_sfnt_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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