Malicious PDF — malware analysis report

Static analysis result for SHA-256 75bd47257194e4b3…

MALICIOUS

PDF

114.5 KB Created: 2021-08-13 22:26:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 866af81889d90451c6b1f0867e40ef89 SHA-1: 7f032db6904cb59d2a5634487a13de7e87c909ca SHA-256: 75bd47257194e4b3e23ce4e1d3c8e53646159b536a62a2a0506a0c8a01345b44
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 a phishing trojan and by an ML classifier with high confidence. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The presence of multiple external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://garglob.ru/uplcv?utm_term=vb+mapp+data+sheets+level+1 PDF link annotation
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc97a3efe3---sedebewezexalapuw.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/29924895024.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/vp3rgajgm30c1vjlu5nbn5cg4b/dedafevenaz.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/tesusatuzeradevonoval.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/10985588749.pdfIn PDF document text
    • http://longarmacademy.net/fckeditor/userfiles/file/97066329338.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/b6lsrlvrtct78n9h71us7r5t1j/negisuvibuwevotun.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076057e2be4e---zopot.pdfIn PDF document text
    • https://pasarantogelsatu.com/contents//files/59389644776.pdfIn PDF document text
    • https://luminex.pl/upload/file/29207070124.pdfIn PDF document text
    • http://imhkayseri.com/resimler/files/kuxajefupedem.pdfIn PDF document text
    • http://skncn.com/u/files/jivapamu.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16095c73390329---8382704953.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608309c00c826---88690571379.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b8efbfb2323826b82b8e50fa3f1f542/gujugirizupawarobu.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/fosexaxabejerazafejizoj.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abef9a66755---93335237065.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/18874346183.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/9536445844.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/5029501148.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/srbosggnjgad6lqt0ooptm99r2/povamipebubijitufo.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/241946315530.pdfIn PDF document text
    • 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_off00015986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15986 19228 bytes
SHA-256: 65aa0aefa1e88ebfba916c67ad928eafff72ff492e1efb002d6258457b45d268
font_01_sfnt_off00018c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A427 10468 bytes
SHA-256: 4f3953a13266b04b344e16387cd59ccc2250b145c52d0bb50e4afaee78a85fde

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