Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fac59b27df6864e…

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 13:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d3557596404ce703b47d05f28ac6582d SHA-1: e49ddede5dcb19e1533f02c8598c168f4cd957d5 SHA-256: 2fac59b27df6864e4c05dc7acc471160aa085729315bba565ea6db3d227e4c7e
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute or host malicious content. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The presence of multiple external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe7da601ae---21891498565.pdf In PDF document text
    • http://mai-colle.jp/userfiles/file/67651987396.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/c60c0eab707ab354fd0edc53273feaba/6339990236.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/vanagorotubadodoji.pdfIn PDF document text
    • http://fittbike.hu/files/file/menez.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/zovifiwi.pdfIn PDF document text
    • http://tiramisu-o.com/yamituki-n/uploads/files/57652358595.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/b40aaca0a1e236ea201a03065c13c513/vutivemaxiwedukulubaz.pdfIn PDF document text
    • https://itracmediav5.com/ckfinder/userfiles/files/pusogovebixuna.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/lotogezanuwujitutukuv.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/ad78a777c679a2e34f3106c7b31b4135/sagilozipilaju.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/rapupizijoxebebep.pdfIn PDF document text
    • http://renovator.cz/files/file/gawafudefixifepolovipij.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/97606134843.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/98391988134.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/62834435813.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/2035026583.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/41906951747.pdfIn PDF document text
    • http://canavesiobruno-architetti.it/userfiles/files/79113215196.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/nazebigorukumi.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8fe337976---walezelomoruvaxoletip.pdfIn PDF document text
    • http://poetryforthespirit.com/clients/872464/File/65155970812.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/ab23b2f3366fbf23a7de80009d4708cd/61832346306.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/baa0e2623d3b8d599cc2ef01d484b3a7/72477496383.pdfIn PDF document text
    • https://yasacompany.com/upload/files/20614866821.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/gurovenutukikol.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c30e3a63---ganizepitik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=ejercicios+movimiento+rectilineo+uniforme+2+eso+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_off0000d894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 11020 bytes
SHA-256: 8e984b0625c1065fac012a165793b1a217790d2e44b6c8e09f1fb5aa1fe98dd0
font_01_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 19116 bytes
SHA-256: 6af9794dd50b9bb5084994d04ad27a8630284ef02b36c67e4c79751e1b141758
font_02_sfnt_off000122c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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