Malicious PDF — malware analysis report

Static analysis result for SHA-256 1716f402e0f636c3…

MALICIOUS

PDF

63.8 KB Created: 2021-05-31 16:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 648e832d93015b1e8a987594754cae1d SHA-1: 268539a9b6733a0ca8166e7a93b569d6e083d431 SHA-256: 1716f402e0f636c376c47b329acff2713b5b8321003e281729f70e487a16171c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is classified as malicious by ML and ClamAV, indicating it is a phishing or trojan delivery mechanism. The document contains a link farm hosted on compromised WordPress sites, designed to redirect users to malicious content. The presence of external URIs and the overall structure suggest an attempt to exploit users by directing them to potentially harmful websites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

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://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160724479e5451---58149136355.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/7d15smddf1iqtdg9q1622houj8/16344203933.pdf
    • http://ipsgroupjjn.org/userfiles/file/11621461675.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/2c23164d294c1a6f0d23d955ef33819a/jevuxuvedalisi.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5acf47097---84910626257.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160867e1850015---rorevimubawiw.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160869cbed91e1---zuwofusaxapixowefanowege.pdf
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/9fe50423d61e24e49fec43359f830ba4/95600005881.pdf
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/b806d4b18b4893b8f283999cb7513aef/fezujezode.pdf
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b36b8fe2ce9---6967826563.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c880abbc5f---marus.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/76faa5a99cecc2738db47342de693130/73683545790.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/ft078gd7fsauir6564arapnieo/35043940141.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/97ah30ort6umjdb9fiuqbrket2/beguzulikinikixavuxumeju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+foods+to+eat+when+losing+weight+and+gaining+muscle
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8b9.bin
4b860e62ccc8ad4fabe8e420067c93a1ee9ab8c3bade99935e9f2b2d796f688f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B9 5444 bytes

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