Malicious PDF — malware analysis report

Static analysis result for SHA-256 4019e9343d2fe664…

MALICIOUS

PDF

97.1 KB Created: 2021-07-21 02:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5961b941b7026d0bdd0e8b64f16b5925 SHA-1: 35e2dbadb8af70fcdb21c4e997f1fec4ab035afc SHA-256: 4019e9343d2fe664d13703ea7d68ccf317c78b35c3ee0e0ff5a58ce6ed814a24
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7370

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 http://biosurfest.com/userfiles/files/poregatumezujofoberamam.pdf In PDF document text
    • https://bandai-k.com/userfiles/file/99548706520.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7f55aa495---20159664292.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/wetojubowasogisilak.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/6v43etvjbmbjga873ju1hhamjb/21312254060.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/11688447665.pdfIn PDF document text
    • https://mangmalungtea.com/userfiles/file/kopibimutanujanovuralavut.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66b853d710---14260683195.pdfIn PDF document text
    • https://www.leadercaravans.com.au/application/third_party/ckfinder/userfiles/files/beninubagavolofifapame.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/93314993355.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b7c51f256---60198827783.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/32507163127.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/5376aabf280f35487f37eaf95f7d6f3c/17077423270.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/028cb5a33718407b23b53849d1a97ca6/24198836961.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac73705706---fijudujenuz.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/kunit.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a46e284a0c7---2736641762.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6da256990a81bd343efe17e80a7a0118/97488631867.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/sadovinowetoletules.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16078f40383836---vuganavupazegubefesipuje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=meaning+of+mercy+in+punjabiPDF link annotation
    • 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_off00011497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11497 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA8 16364 bytes
SHA-256: 2b23956678d7f0d9aba7d850641a1609abe73a0f300d108affd0360b7e9f0202
font_02_sfnt_off00014331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14331 19596 bytes
SHA-256: 349b78013e6fbfb9994f5b3f6930378da7cb483badfa6d207270aa4746f1a1ad

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