Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75c645b1d59cd55…

MALICIOUS

PDF

65.1 KB Created: 2021-08-29 19:14:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4e3624c249e3f241fbb5cd039ae45e23 SHA-1: f12b278eafacf7ba878ea3c10e2936bd249f0d07 SHA-256: a75c645b1d59cd55c35578ec79c84e6394aad8985127e16b14c75118c4fa9645
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it likely serves as a phishing or trojan delivery mechanism. The file contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to distribute further malicious content. The presence of numerous unknown URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6736

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://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bb8d5ea51ae---gajeponabijemigatafuzixe.pdf In PDF document text
    • http://saxonrt.hu/img/userfiles/files/39624019088.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/210816195841530117dx032u.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/02ec6748ff37cfa6ae7c3aa8c03b9cae/89421731182.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/pogimab.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f4ae88b94d830a044c8e78e8e7abb4ec/basosolopugamifetekanobu.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/puxosisugoxigidexifirule.pdfIn PDF document text
    • http://ieeepes-thailand.org/app/webroot/files/files/jubaxu.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/04gqvbv1q6t40a6725hlvo5gr5/22982402852.pdfIn PDF document text
    • https://nada70.org/userfiles/file/29147648630.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/803fe533be6f77dc78f3db9158b8dc5d/xokaz.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/c2aa4317ea37d8962f05c2a3801809de/41527007933.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089d3d0e627f---tudezivorefege.pdfIn PDF document text
    • https://daismene.it/file/74653362535.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f05020416ff---23983471272.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/ae02c6ac59d3006e8f6c9bd22d0fc7bd/wivaginepavu.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/mikukivuzawasotuledisaw.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/amdnl4uvn5sm7kct0fmbjbuf42/19123396760.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b3310c4a6---gawojixanozejigujewezoxa.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/32888444711.pdfIn PDF document text
    • http://yacpa.org/yacpafiles/file/20843239363.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/tozujadibure.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/52847340293.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/61316547393.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/ruwezizipuzidede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=communications+interview+questions+and+answersPDF 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_off0000dbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC5 17452 bytes
SHA-256: 02512dea4d30284786196a3958560fa51b3ea734908f0ec87e854d00893deab4

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