Malicious PDF — malware analysis report

Static analysis result for SHA-256 384b1aa37ad4a0b7…

MALICIOUS

PDF

79.0 KB Created: 2021-07-14 08:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0c7dc8edf6a2eee0c7c0c3596a5c0158 SHA-1: de359dafb4e8a415cf71da0e632e0b61b602a3e9 SHA-256: 384b1aa37ad4a0b73e9f495905ed31c25448dde8c0b47ae3a7e8a9d11aee20bb
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c3f38d50e---82417314935.pdf
    • http://3dprofi.net/images/uploads/file/denidinima.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964899b8323---xojumikiwo.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e88b68efb7---95888072195.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/6be415440117ec0860fff4ff0440caf9/87235103507.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080128ace5b8---67397092611.pdf
    • http://tlxzkj.com/uploads/file/042151344575.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c39b01e8b38---4694322332.pdf
    • http://creaorganization.com/depo/sayfaresim/file/75942067779.pdf
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16087f55ab6995---17101267803.pdf
    • http://arch-teh.com/pic/userfile/rasapikivasewividifobena.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/1i33ibil1osf568lo64a83uhiq/67773796482.pdf
    • http://buergerforum-tirol.at/file/minolinufuleginedonagom.pdf
    • http://pelesiuvalymas.lt/i/File/32037652009.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b04ba7f82---rutuwibamawebo.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/d22c278df3d4c1875668fd31f6381e21/tiseko.pdf
    • http://afghansolar.com/userfiles/file/86035745458.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/671b06167be3061c9df4c2c8edd7f048/firawexes.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a9825ba06---livawenewupakugezogojigit.pdf
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906c20d3e8d---jogaxosalizusotolaneje.pdf
    • https://palcev.ru/userfiles/file/kidinorej.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b602da310bc---guxapusizesuwobifijerego.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a19229e5d2e---vuxazumeseka.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/c4382ee3f779a25fa84426c4c4378d73/64768877048.pdf
    • http://aitrans.org/UploadFile/file/F1202105101517376899.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=2+d+echo+with+doppler
    • 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_off0000f301.bin
10df0c67f30c4d08b24f02c5c4b937b1e4cb11a9833f795a88e3aa3d1262d961		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF301 10288 bytes
font_01_sfnt_off00010a58.bin
d8ae6c56cf4afbf09a55d3e2878b2ca770c8047eca48db42521f853321fdd50e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A58 18172 bytes

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