Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d63a7411fd897b0…

MALICIOUS

PDF

84.0 KB Created: 2021-09-08 01:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 60a6d8db6f7721b581bf207184390037 SHA-1: 72e38e408494808f4d76f5915b87d9bd5dca05c0 SHA-256: 9d63a7411fd897b0e9acc7b0eaf49f5369071218f35902fda45d2417c46ccdc9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or trojan distribution. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to redirect users to malicious content or exploit kits. The presence of embedded URLs and the nature of the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cructi.ru/uplcv?utm_term=ship+hydrostatics+pdf PDF link annotation
    • http://jarosi.hu/files/file/24496080649.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/babozasa.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161201b3e4aa03---gusixuj.pdfIn PDF document text
    • http://thermcom.cz/userfiles/file/tejuxanakivadafid.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160af923650f0c---xabimugorovurote.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/todukimeluzawamilup.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/13526923776.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/aba39713b190506000fc33dd85e8220d/fokuruwoduvesajor.pdfIn PDF document text
    • https://ymvii.com/admin/upload/files/37591619790.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/padupaxibexemisoxawul.pdfIn PDF document text
    • https://izometal.net/mm/file/vuditivija.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/lekosawapebagup.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16093ac576aacb---nenisatitisadelame.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/wekiw.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/rifuj.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/kulom.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/07483f09c7e7abe9222baf5e2d863da9/jabukifepemi.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/57487255195.pdfIn PDF document text
    • http://giprozdraw.ru/ckfinder/userfiles/files/94635919785.pdfIn PDF document text
    • http://zlhk.ru/upload_picture/file/vuwapazijigamenekuwa.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/5598537f993af1d1a76d61b0ea364c7e/sogukusofowomowas.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/83885400113.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/83c58ef2fd3071386a307b6979432e99/71820317930.pdfIn PDF document text
    • https://szamitogep-szerviz-javitas.hu/ckfinder/userfiles/files/36675197473.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/8d54728548e0b499484b226075c3dc33/katuxetigeravug.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_off0000e363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE363 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7A 10624 bytes
SHA-256: a89ae2e376dcb40767ffc9be6cf2c2c29f7f5b32bcfe5b3d4cf317b047fd933e
font_02_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 18056 bytes
SHA-256: 4c98dd6608e34496debb2c1b844fd3f31eb71a6bc3c0f374d8b27e461a6ddb29

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