Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f46069b84309ff8…

MALICIOUS

PDF

80.7 KB Created: 2021-08-01 13:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a5c553db2a9922a94a194b75bfdcd1ed SHA-1: d3df6bad2c244f72156bedd317cd65dc77d55de7 SHA-256: 8f46069b84309ff841e060a0067e0eebfcd132308f4f659132eb2a712de62e64
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. The document body is heavily obfuscated and unreadable, providing no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/duzegikudizi.pdf In PDF document text
    • http://gramercy-grand.ru/files/file/wadomenonoxowibitisoz.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/wopegijarupor.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16095ab9f682f5---galodesa.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16090ce8511741---geguderadenumipaxusalozu.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/mifivojatuxa.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///muretefe.pdfIn PDF document text
    • http://palami.by/images/file/vixovu.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/7518178601.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072f90c739e0---75156543616.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ac88d4b8ec8c729647de43cc3e6fdeca/39059637979.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087dd500fc55---jotumipifaxoru.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/30ccd36ff3559dd19fa65c938139849a/45538369770.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/tibujuwusefi.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/19680518035.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/40b1960322d17897b2d2590046c33585/bigefigizolorerira.pdfIn PDF document text
    • http://vanhacollection.com/images/files/58000686131.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0da3cc860---3826936412.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8cb509d22---ximanerisolufanovixepafem.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/5cf9066bf619190584855733989b3658/xukuwipetojesal.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/retotozona.pdfIn PDF document text
    • http://kodemari.info/data/files/dabojiziremido.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=virtual+regatta+offshore+helpPDF 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_off0000d762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD762 17524 bytes
SHA-256: 2eb47b4254e47bbfef46b9c6b4933eb40dfdb9f3cb7ee4c515ec3c7f6cfa246d
font_01_sfnt_off000104b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 10604 bytes
SHA-256: 1f2f7dfaabce26072520c454fa80cb41a22547b6cf5e7030b04f17952a3d7c8d
font_02_sfnt_off00011d21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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