Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e20de743aac1025…

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 14:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 36ac22aa6911313fdcdff9789a58ca95 SHA-1: c6b87fbb9b6d8d6201af11da389f43e81e569698 SHA-256: 2e20de743aac1025893c37a4c4b40a616d2aea5f27544b8c34524d7128cfcc41
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 high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to phishing sites or download further malware. The presence of PDF-specific heuristics and the nature of the URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://cristalparkhotel.com/ckfinder/userfiles/files/31571014856.pdf In PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/f85baac47c25a938e8d32be30ed375ce/79336192913.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607719a4077a3---89177165890.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/19712480995.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/80db14daee4ad574dc5304e15a33e76a/sirorisoxenorew.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/buvugawoxitokure.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/5bd625d3b4bd65e1228cb3c1ce153708/netijetobolisetarusel.pdfIn PDF document text
    • http://polletnv.be/uploads/files/nozarilijalanosogiko.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/s38bdr1d1nrn7f6o75ig944167/578983202.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/57a7ed203c9fd04dd1c962ef715189ac/noliwugoxoji.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sofizalafovosedef.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cd46a9da8ea---gokejakuwanivekowizewema.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/panujizomexalezuxojexeriz.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/48186233258.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c1f8676a3de---1648760071.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/gajafonafevewi.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/16594821486.pdfIn PDF document text
    • http://www.kammerpop.de/files/file/5630375764.pdfIn PDF document text
    • http://garderoba.sk/images/_file/vakugokozemenuxovirubul.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/tedobugededavazuw.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607928793b405---davofirejox.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3c55da7b7---dusekadazafilowixevaro.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/47807891062.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=event+company+profile+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3D 10776 bytes
SHA-256: 7234061676446839a6b06e21455f1380f489fbc9ba222a7c67ff8ef3fcf92698
font_01_sfnt_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001101d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101D 18072 bytes
SHA-256: 914c5aae03dc093b7d26fc93e6999679c54f58c54b139cadd9b5884e69ac718d

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