Malicious PDF — malware analysis report

Static analysis result for SHA-256 a02b6d0b77954bfd…

MALICIOUS

PDF

73.4 KB Created: 2021-07-04 10:16:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e2f7515fb0bab85cab705a10b5ddf626 SHA-1: 3279292206d11effcb43e4a5af3b5644687dd590 SHA-256: a02b6d0b77954bfd7f3dda22cb9d93d3fe97ff44115bb2bf496131bba54ca442
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of external URIs and compromised CMS upload links further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6161

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 https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/b7701d60d1db016fd2667675add5938c/tozomadivapibuzoj.pdf In PDF document text
    • https://nutstudio.it/userfiles/file/jabusonisigurefane.pdfIn PDF document text
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/zumavopu.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db62e80dc2---naxajodu.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdb255ce5a6---wasezolazanufaxuge.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/patominolu.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/62259056085.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/58892826917.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/tipasawu.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/54248730284.pdfIn PDF document text
    • http://meechoktoolmart.com/user_img/files/58260882046.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aab4557f5c5---30871902472.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/9088b5108dc6dc7453285f86e5da725a/15893398279.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2acf61572---14675750808.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/14faae48cd43324c10c0c22e3bf8de4b/tetuvi.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/7276238013.pdfIn PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/ba255e9287942011bd0d4829cabc9c2b/bebemutolivaze.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/zofasajetisabemejufuboge.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c91c7c8e13---rerikerewalinuz.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/sb0snepdvudru4vpm8tmr6phl3/wawisexitixujej.pdfIn PDF document text
    • http://escqatar.com/uploads/userfiles/file/file/9556461623.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/mepovurefisabupaserijud.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/q92iurv98dg0oj817c48t40525/93927833838.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/wazisinupun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=autophagy+in+immunity+and+inflammationPDF 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_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 10740 bytes
SHA-256: 4814fb4285da40c423f7982bad8b6a9bb80f2afb8307632aae9ad2cae56924a0

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