Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d752cf0bc945ec4…

MALICIOUS

PDF

85.9 KB Created: 2021-08-01 07:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 31b69b76625f88df1f04d76186139051 SHA-1: b47beb7b9d05666a7d040918cabc0ada3c88d870 SHA-256: 1d752cf0bc945ec4752971cde6ed22b52628d08f6ae2d6b7d6eb1f560c0e05b4
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or a downloader for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6120

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://archism.ru/uplcv?utm_term=manual+double+sided+printing+epson PDF link annotation
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6edc8d362---94574339803.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/s7388ho5upar4v97178mc5vep3/tedelabiwamomekawug.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/94580579536.pdfIn PDF document text
    • https://nestuby.com/userfiles/file/10329354687.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/sobadarevadepi.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-4-29/20210429150410711153.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/4985340543.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/timasome.pdfIn PDF document text
    • http://jumpstart.mobi/ckfinder/userfiles/files/51275030591.pdfIn PDF document text
    • http://hansungidschool.com/userfiles/file/xabawozawakigibuxer.pdfIn PDF document text
    • https://acrgruppe.de/userfiles/file/91842995016.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/34cc507cc8a1a18cc8711422ef77dcce/difewe.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/88081d4f0f8cfdf1523eac28fdb1c8ee/42609658991.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e687bc79a63---xamikebijitobeneve.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/ukbe96e9o5u2g9pevqrj02hh0t/49030428019.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/57118513826.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c093f61f85c---24959327207.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607879d7a54d6---3915480468.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/26582871258.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160db8a41c4920---bajaf.pdfIn PDF document text
    • http://seamacros.com/upload/file/26827713481.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/pazijebisukuxujaduxo.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/e3g0rqegtj6uo65oo9e71dvnhj/18128758043.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ohg7tihu2gob1oq6gdnsgdnpo0/deretipiladowolojukewujuj.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/hblue8niaonv7nbscguk0hgoo5/jexubux.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/0d312e7025733beed112d5c3895c58f1/27049986745.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096b9134d4aa---77826063011.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_off0000f17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17C 16920 bytes
SHA-256: cd18dbb322b34e0b6c70a31bc74e1e6460fcd10161e111f5c4f1daf66c7a40e7
font_01_sfnt_off00011dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAE 16944 bytes
SHA-256: 2adafba59cc001a986411af6c5ba0e2696aeb043bc61fcdd0622c7f72230027d
font_02_sfnt_off00013660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13660 10800 bytes
SHA-256: 6d36771a3fd0f441e8a23746abcccdadc1388eabe502ada8cd43f05685cf9c79

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