Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba5f7077e7bb04c…

MALICIOUS

PDF

71.9 KB Created: 2021-09-19 22:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3e2960e8d64d43041b9a39d004ba7356 SHA-1: 802de2b4a498019aa95b45a2930c714ce7ccfac6 SHA-256: eba5f7077e7bb04ca350dff34277ce4db94a67b88e85dcb77aa39b9dfde0e87e
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The file's structure and URL patterns are consistent with a spearphishing attachment used to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/mh2kvm713sn2qem7fldacg8ja2/87365922114.pdf In PDF document text
    • https://zaragozadenoche.es/upload/files/nurox.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/b1203njdm7ok8046j8ie99ob1l/11003774278.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///bizugubi.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/99669769202.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/dc8987a3e6e73546a57b16b4ab571a6e/17236582806.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/3512154988.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/damitiwifobikiz.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/femizexogezaju.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/10776540086.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/vuvuxuzuludiratixobagiluj.pdfIn PDF document text
    • https://expomediainc.com/upload/file/fawuw.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436252ed360---jamujojimamadu.pdfIn PDF document text
    • https://aljuboori.com/userfiles/files/firemalisa.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/xirovokuki.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/91622542620.pdfIn PDF document text
    • http://nm-union.ru/ckfinder/userfiles/files/zisafasemope.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/64628201029.pdfIn PDF document text
    • https://izometal.net/mm/file/bevupeviwezezabegavifusej.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/62986605634.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614100c9ccdc5---roxowutulununosexop.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/luneweruseme.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301fd4bad24---27211705323.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae6ed8dcd6---9215138571.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/93386078835.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/32407207640.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/93894887566.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=game+chupane+wala+appPDF 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_off0000b640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB640 17524 bytes
SHA-256: d5279b32837bddaf3d864319d8bf99cd8d46ac229825207f43ebd1e26cddba38
font_01_sfnt_off0000e2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0C 10284 bytes
SHA-256: 059ab727c897d43a6db2f58aa17807337fa355f731c6309f9605efefebf47500

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