Malicious PDF — malware analysis report

Static analysis result for SHA-256 342e3fa4c109b50d…

MALICIOUS

PDF

91.2 KB Created: 2021-07-01 19:16:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c2375b12ba3978cffa98f5d0eb634ce0 SHA-1: 0ad63df3f61fa0240398cccd47550a9d32604409 SHA-256: 342e3fa4c109b50d5f36658d0c5033e7bbf8ac14982f57fa4d60dce2895d8437
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host or redirect to malicious content. The presence of multiple distinct hosts and the use of formcraft/super-forms plugin upload directories suggest a coordinated effort to distribute malware or phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c4f5ab6b---lubanumerivujekulesi.pdf In PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/32dmprthpim43eamt2bt3svmu5/46782270278.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16099bded4549e---39420645271.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f14a579a0---13388379668.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-26/20210626022722658553.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/a540269284c5bcdcdcc12d15db4766af/didakek.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf4ec8b690---zadebojabijazaralijuw.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160935b9c1ba93---kixorelogigepa.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/789918893.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/ragizodejasasileg.pdfIn PDF document text
    • https://strechybenesov.cz/content/69663710191.pdfIn PDF document text
    • http://lacyfamilyunity.com/clients/2/20/203fd950dafdada58ea32e7b96f0d147/File/27422829846.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/rulibasosog.pdfIn PDF document text
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/c1l1tk0kdlp759hv8pdvgt332o/xaxawijuludo.pdfIn PDF document text
    • http://filatelianumismaticaumbra.it/userfiles/file/kepijarefefijisoxazoxem.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/lizava.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/1ea803cd7afb7be6789cf91da597b832/wuxoviwafidumup.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/71471340810.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/hmpda8em4g9jfveacqrtold6h3/4937023483.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823dffca6e1---gibuko.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce659730f---zasexaratawulipurujavetex.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d256867cf7---farixivikazudesutu.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/33d35c0cc90c0ac9f8ddd56b600af47f/narowafuf.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/fagovixaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=monitoring+and+evaluation+cover+letter+pdfPDF 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_off0001022d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 17156 bytes
SHA-256: 79f7392b76ddd61a617d7ede0011857e64f9c9fd02bab125e00176dfa3e40361
font_01_sfnt_off00012e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14671 10788 bytes
SHA-256: 5cb359d61fe63d89c722a0f96b6a125aa1e8cbfd5cf982ccb36c0a275bb42c4a

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