Malicious PDF — malware analysis report

Static analysis result for SHA-256 025dbbd54afad28d…

MALICIOUS

PDF

133.2 KB Created: 2021-07-14 09:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ed5672572808f005796dad4f9eb94e70 SHA-1: 1b6822d7feab656dab5b6c8d7dc2b3aaf9ffd2f2 SHA-256: 025dbbd54afad28d2f568b7b8944b98fb6df383e74d31f8bacccbe604a2cb472
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs that form a link farm, pointing to various domains, some of which are hosted on compromised CMS platforms. The ClamAV detection as 'Pdf.Phishing.Trojan' and the presence of multiple external URIs strongly suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the nature of the link farm and the heuristic firings indicate a malicious intent to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4501

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://oniceh.ru/uplcv?utm_term=love+in+truth+and+deed PDF link annotation
    • http://t-p-fortune.com/userfiles/file/maraloraxidetobexuwe.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/29119192438.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/33766910287.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/kepuwokefagogovudu.pdfIn PDF document text
    • https://unosms.us/userfiles/file/40932047113.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7e5de014c---52663918707.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/bekasizofexajigamudo.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021051508542797.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/wekiredalalusol.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efff9999c9---34384686737.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/38362851191.pdfIn PDF document text
    • https://mfdesign.hu/files/file/36830786856.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/7218306554.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/dulolajapoderefi.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/04bcbab5fb0c65feac8f8d4da5b22716/47665638826.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/97780566331.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/3b7il9toakk7gmcub068q2coe7/10197889984.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/43246039220.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/8s9m1q0je6ojacthbjorit0ukv/24755664570.pdfIn PDF document text
    • http://islandpointfl.com/userimages/nimaxusodakopifebagibigib.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/58780611777.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e217474f01e---1643899819.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/woliwokunese.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/57662780961.pdfIn PDF document text
    • http://lovellreunion.com/clients/4/42/420738e4954c29d3cfd02fdb1bc9139f/File/bumonepirunasusupumodo.pdfIn 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_off0001a7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001bfcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFCB 10256 bytes
SHA-256: 78509f2f23d74d4e84329e92dec1e416fe5e3dbd475918e8422a60ae68a546a4
font_02_sfnt_off0001d6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6BF 25468 bytes
SHA-256: a1acbfa7af9c86fb9ad9a2efc0b71550d74ad04d2cd887f8a5e0d9f1cb4962e6