Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e2c2d1abc4cd299…

MALICIOUS

PDF

67.8 KB Created: 2021-09-05 01:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fcdef7dace23ac0158f3bbffc390c786 SHA-1: e1d2b89aa186fbbefb896f4728f064cea76a730d SHA-256: 3e2c2d1abc4cd2998df1d39ce0b10a889be86c78a32fbdca85e9d6513729a796
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, directing users to multiple external websites, many hosted on compromised CMS uploads or disposable domains. The presence of embedded URLs and the PDF structure suggest an attempt to disguise malicious links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4539

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://maxbrio.kr/files/files/45399711460.pdf In PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/bad8285561d09588c09e2b6bdebc5a6c/mopezivebepafufu.pdfIn PDF document text
    • http://licausi.it/userfiles/files/10416012539.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/tf8ssup96mfl5bbaf4auui5u7e/26097127024.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/3018042ba7a4f783aa54dbc3f8ef8b6a/23566827689.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/086e8dc32ce2b72467628cf1c0c86f2b/zulularegedipur.pdfIn PDF document text
    • https://wsbtitan.com/images/file/53396871953.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c3717d115---tumumeli.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec962a7527---14857210347.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/99145024061.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/bewifadukokawojawejizar.pdfIn PDF document text
    • http://activesolutionelectric.com/images/file/38635981558.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/44537967620.pdfIn PDF document text
    • http://pcwenhua.com/uploadimg/file/1627252289586575516.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/d712abb911699c89945e07b7dbe68f96/17758162178.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/bumasurobijesazepavu.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/widajus.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/97871720479.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/kusanudolonaka.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/luvukupenabevonoxixoje.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/33267824227.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f3a3d071---22149830574.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/evd9q9rmsnpev0e10a1baa6nvv/pupibumawenowowotutojur.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/wilinajigobakififadon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=breast+cancer+review+article+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCACE 10696 bytes
SHA-256: 7ee5efcabf82cda8f24e3effd7d760f640ee1159eea98960cbca0095e489c914
font_01_sfnt_off0000e38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1