Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf36c059dc57cef…

MALICIOUS

PDF

80.5 KB Created: 2021-08-15 04:08:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c9b48cddc19969360811428660cb921c SHA-1: e2ff2e72ecde8f4d9e23a0f206d692ad6476a450 SHA-256: edf36c059dc57cefabb59dca661bbd681a2c056b8d7ec4adad888d9b58db0a17
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple domains, some of which are hosted on compromised WordPress sites or disposable hosting. The embedded URLs suggest a lure related to job applications, aiming to trick users into visiting these potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://chrisdepanneservices.fr/Sites/cds/files/simixugefowo.pdf In PDF document text
    • https://qian-ho.com/upfiles/editor/files/99311681354.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/75723920595.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/ketizadagijarezapikatare.pdfIn PDF document text
    • https://smithsgame.com/calisma2/files/uploads/tudoxojimidotitodavurufas.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/1790625091608ad17983d8e.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/234332690.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/ermtmlbq3t6kcerj2hf8lboef2/48424128265.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976d0814462---jadapurugegek.pdfIn PDF document text
    • https://dineflon.com//files/xavenukanujedotofevo.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2318256add---tonixazevanejetuvubivoku.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/b364ea3bd6ff004eda95f1484977b87e/bekojimimawedilikiwidadev.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/3446532020.pdfIn PDF document text
    • http://www.pvvc.cz/files/gizorinuxar.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/69585531371.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/71449406663.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///dejir.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2a56cb474---jinasefuj.pdfIn PDF document text
    • http://studio-castiglioni.com/userfiles/files/79199956001.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a79eb33852b---fawetasetu.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/2r6i6oh0520tc737hros6692sf/72393174083.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/a1e34fd52d8e7c1303d8209a1b503af3/76468013876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=formato+de+solicitud+de+empleo+printaform+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_off0000d3e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E2 10860 bytes
SHA-256: 3ab3183411fc295ea1b75799e31dbdb8da2b7d169dc9a43c191fbf9428fce464
font_01_sfnt_off0000eceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FD 18072 bytes
SHA-256: 2ecf71ae94702ee315eab2d3b217389fe8e4d04a003d717e660ec050af6c5c55

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