Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a699293c57c0244…

MALICIOUS

PDF

67.9 KB Created: 2021-09-12 21:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 13a96cc593bec69bfbd774d2bdd4bc22 SHA-1: e47931c4bede4ba61172ecf7a3b816e082dcd162 SHA-256: 7a699293c57c02441cb5f01bd5fd8e12cd7c690d6c3febe880604e90f0161910
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lure users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7907

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://smsalumni1971.com/apadmin/uploads/userfiles/files/93345334073.pdf In PDF document text
    • http://dierenwinkelindex.nl/images/uploads/75162051379.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/1499596373.pdfIn PDF document text
    • http://headlinesdinerla.com/uploads/files/30250611009.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/161355d52cef71---xetomoravozaj.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/bovezosamidilamitafezupa.pdfIn PDF document text
    • http://tfforming.ru/d/files/38502272480.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210906060930.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/89065261406.pdfIn PDF document text
    • https://hoangvan.vn/wp-content/uploads/files/vemofazezimariwuzidu.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/79774654168.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/gerejibubumafesebekalav.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/musiwosotobim.pdfIn PDF document text
    • https://tierrettung-in-katalonien.org/ckfinder/userfiles/files/95932252734.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210906_D22E72F4A8103A69.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/460455a5b3cfed21a1b43dce2b1c4a54/retotavuwedozanowefepasup.pdfIn PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/45860838058.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/27856065927.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/549c5f9c5a80e983d16abac25775ea61/82634158499.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c4c3af991---37555594917.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/mufiviborufafivulojivul.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210905011148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=khamoshiyan+full+movie+download+720pPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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