Malicious PDF — malware analysis report

Static analysis result for SHA-256 464a2bb676633eb3…

MALICIOUS

PDF

63.6 KB Created: 2021-09-11 12:13:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 21a37a1633707ea656512a8c89ae1764 SHA-1: 01ff928379f4905f25eb700ea8093da3b3e9af2c SHA-256: 464a2bb676633eb33d752ec320614d069036be1efc6ff956c925b3b3f08534df
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted from this sample.

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://emmaushuis.org/pages/wigujebiruluzitu.pdf In PDF document text
    • https://facades-et-traditions.com/actualites/file/neloxuwemazeg.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/16840134949.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a2d197d89---62817041045.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea4a22a91f---39994020260.pdfIn PDF document text
    • https://shieldtech.cz/ckfinder/userfiles/files/fujupewivosat.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109040113067961.pdfIn PDF document text
    • https://protraderin.com/userfiles/file/rakadobod.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/83882673337.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c705e82070---5729671490.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/23999837154.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/51590884275.pdfIn PDF document text
    • http://istihdamhaberleri.com/upload/ckfinder/files/49475408400.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/fogofipisokopinep.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/dafodixos.pdfIn PDF document text
    • http://potentialdesign.cn/userfiles/file/1630691243.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/82946184305.pdfIn PDF document text
    • https://wildnaturetravel.com/File/74697609357.pdfIn PDF document text
    • http://gerastar.com/userfiles/file/50509174966.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/69941430752.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/1325454027.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/jilaxun.pdfIn PDF document text
    • http://giasuminhtam.com/Images_upload/files/96841874730.pdfIn PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/mawewujanifelu.pdfIn PDF document text
    • http://tvcsoltau.de/userfiles/file/tedaseloleva.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/46769495367.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=viber+for+galaxy+youngPDF 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_off0000cee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE6 16852 bytes
SHA-256: c912720a6fbd7f2e8b5b8802b4a22ca6107b3fc78752585de56f15a6e50e1bc7

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