Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e2b093d88f1d2d4…

MALICIOUS

PDF

79.0 KB Created: 2021-08-05 00:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b8e20bd0eb9c42cc4c704b87f732cead SHA-1: 4e99eaf829dc2e14f01c02f9bec786326192feed SHA-256: 0e2b093d88f1d2d4b35d7f98bf366d57d3cd485420182a67368b3aeb9496f9e0
124 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous links to external files, many of which are hosted on compromised WordPress sites. The ClamAV detection indicates it is a phishing trojan. The presence of multiple links to PDF files, some with suspicious naming conventions, suggests a phishing campaign aiming to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

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://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49790696c---zimisukuwopije.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac79fd33abf---febogigigojonadi.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b27db2016a---52075441392.pdf
    • https://xistenze.com/files/files/51636148753.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/448124be7613f92eca535736b238b651/23557389186.pdf
    • http://bluedevils59.com/clients/862365/File/97928436245.pdf
    • http://poultech.net/d/files/jilegurupekoto.pdf
    • http://pogologistics.com/ckfinder/userfiles/files/jejofujapufitinode.pdf
    • http://interno-kazan.ru/upload/files/3916111252.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/25950844945.pdf
    • http://hiddenroots.org/clients/19739/File/36934929561.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160816042f2ab5---tubigutosigu.pdf
    • http://laduses.nl/image/file/jizikovomogix.pdf
    • http://dunajecbiala.pl/upload/File/tetekowixupa.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc541773ad8---foxiwomabozexosikime.pdf
    • http://cokhihoaiduc.com/uploads/files/tadoto.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/visq7ar3tum5jl8r7kesmcihr0/59456324771.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb55f7b36a---terazirusotudavipeturuga.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb065428d1---96297404824.pdf
    • http://beastyenergy.com/userfiles/file/68076158990.pdf
    • https://stijsr.com/userfiles/file/54474162885.pdf
    • http://alhouti.com/userfiles/file/wikozesug.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c7ffaa0ef---5366025543.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=don%27t+mess+with+zohan+full+movie+in+hindi+download+filmywap
    • 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_off0000f2b0.bin
3ffb082a12c4c7795a33c929ebfabc7adb0364e1b0b7a5b787331868d071cc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B0 11124 bytes
font_01_sfnt_off00010ca0.bin
7bbc9ae1f3b4fcf29ca6bb1fb58a68fcaabb66b1fa77b8bf1f0167f08551699f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA0 17884 bytes

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