Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5862c054c83063…

MALICIOUS

PDF

102.1 KB Created: 2021-08-03 05:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2fc26021a8c016e806b551b196f4d52 SHA-1: 6da9b87234dbc51d5053a8a410877bf0e78de8d6 SHA-256: 2c5862c054c830637980cd20051a40fdf16e6dcbca17b409a4b5958ffd413424
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2805

Heuristics 5

  • 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
  • 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://allytemp.ru/uplcv?utm_term=1999+polaris+sportsman+500+shop+manual
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/1a8afe3fbec89b70a722e20cf4c667a2/fadetisurijegobo.pdf
    • http://konsultacjenaukowe.eu/Upload/file/notadivirafujid.pdf
    • http://westmoorclassof1965.com/clients/5/52/52ec68f2b927accf75267cb07bfcc891/File/forogixumuzotorev.pdf
    • http://thepokewave.com/uploads/files/18628092262.pdf
    • https://alianzatours.com/imagenes/file/63190427551.pdf
    • https://lapalettedesarts.fr/gestion/file/nugexudoriruke.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609836e1223f5---tumopovazik.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/739861f3d07a1ac7077aebeae486dffb/lowabulifidevovoxijuk.pdf
    • http://eia-edu.com/userfiles/file/58354312980.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/7c903ba119252579845f8e46affac23e/xapuwofaxafi.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/eb6ed88496b96eeb4eb79b46996babb8/4608852680.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3291a5144---78956078504.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/km6eeh9gn9vr3s5fb30cdvje6l/boxijelunovajawemoruwo.pdf
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082233454683---2058440250.pdf
    • http://haustechnik-hagenauer.at/39301224174.pdf
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a2b158a7---69095748419.pdf
    • http://aelma.com/sites/default/userfiles/file/1485404267.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c9b141f89---lodizibetologitogiloke.pdf
    • http://hotelbelleepoque.bg/userfiles/file/dunet.pdf
    • http://ambulatorioveterinariocamali.com/userfiles/files/29321325948.pdf
    • https://jkmart.net/FCKFiles/File/jetusasofejomuralu.pdf
    • http://waypl.pl/upload/File/xuzimopudadugilaxulujafit.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160be37e7573bb---72645939166.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016562.bin
c2982cc376a3f13bbe62858eb0cc80c36852e171dd1093c87df513f736324a0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16562 10864 bytes
font_01_sfnt_off00017e4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17E4F 16792 bytes

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