Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb84794105c70ed…

MALICIOUS

PDF

88.3 KB Created: 2021-06-28 18:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: af231999c40d9e15f52f1d81d1e1f74d SHA-1: 7bb9c2afd39f296687dd6afeb8c22a330178bec4 SHA-256: 0eb84794105c70ed26543cba4b41b80ab2bf9785ca85276b689644a6b0914818
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely serve to manipulate search engine rankings or direct users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://shiraz.sk/ckfinder/userfiles/files/57527907721.pdf In PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a5acb9d01---sazemoxizafedagigedel.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/vqv5gu6plubkjg7cv213lodt75/98390544281.pdfIn PDF document text
    • http://emmanuelmissionarybaptist.com/clients/74938/File/sinabemovevodotezafer.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/kewelisefinaletesog.pdfIn PDF document text
    • http://allycatering.com/userfiles/newotozusuvamipazovumi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/niidgk4e38vic6fmkpg3488b8p/55093493062.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/eucrjc7m18esu6td9fcbk50ck1/tukolud.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dea6334f56---larilumujakewelunofamutev.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2af40c8f5---87328069810.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ffbfdeb4961eb6354d5b4acffed9f18d/gabuwutitubomexojabinakut.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1c61211da---rubipojevekosokizoz.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/74911586479.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/3sku266p6r2i4oibrqnep7f32m/juluwezikuzir.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/1gf87ub2ca1l8bi3k28q2t2eug/57299222256.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075356739178---mosezuvunafe.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/sovop.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/xutomudozesefobakivatanib.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/11cd92dcf0b66b1d8048899a1ff76d51/wuworavij.pdfIn PDF document text
    • https://nikoljski.com/ckfinder/userfiles/files/115118559.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbfa6a445a---78626776179.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/sp990lb901u111hlg71tsjn4t0/4468308014.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d893af1b48---98330524155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=what+is+a+subsonic+22+roundPDF 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_off0000f61b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61B 17524 bytes
SHA-256: e800137a13eb7336e646c253df8cf90985e21fab18bb0a3c9a11da4c2d590065
font_01_sfnt_off000123cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013be4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE4 10644 bytes
SHA-256: 28fc8027fe32a391b9e770ac9decfe270924e3d4155dbb762d78f14bb745fba7

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