Malicious PDF — malware analysis report

Static analysis result for SHA-256 b94b5ce9ab7fca29…

MALICIOUS

PDF

63.7 KB Created: 2021-09-16 16:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 087eddc2754e8c2126c1573a4e4de1bf SHA-1: ae3e9f0f7648e09f2d74e76981851b2af1d247bf SHA-256: b94b5ce9ab7fca294322d646259e43c5de00707b19c983879c496c0401bae28b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate maliciousness. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to obscure the final destination. While no executable scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5692

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://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/sm1obsutru5hbpk6lh1pj8knlm/58467170883.pdf In PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7975868f2---44023368378.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/26342030168.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/85462855183.pdfIn PDF document text
    • http://creaorganization.com/depo/sayfaresim/file/46538181603.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/75283991390.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/65019875550.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210910235342.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d08734ec2a---54523048954.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/70d6d1509ac3eada0b40f5edda710908/lamofowimodegavuwinepiv.pdfIn PDF document text
    • http://hausdergesundheit.net/userfiles/files/45731532646.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/19302640007.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/bfb30185288e37a822482fc5f2eb5ba4/16889833937.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/sinavonu.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/202191014302.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/zupusarob.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/nedokerurepaje.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/21470520810.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/bedisabilidiribijobutinut.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/90390161963.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/xufosir.pdfIn PDF document text
    • https://zzwgjx.com/d/files/44553308246.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134dc2b3de1c---perixafalara.pdfIn PDF document text
    • http://swiftnb.com/ckfinder/userfiles/files/wazavofinelapuburotemo.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/98980466308.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/wakamizad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=photo+resizer+apkPDF 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_off0000dee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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