Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2afde605e119bbf…

MALICIOUS

PDF

90.1 KB Created: 2021-09-19 03:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1a7b6db304d3b0e0e51b2b70e985df01 SHA-1: c89305001d26f312cc2cfa06a63dc7c5bbd37fde SHA-256: f2afde605e119bbfdfb8fae77651c5344d84462a7fb3877fee2b716123c10ac8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a PDF link farm by multiple heuristics, indicating it's designed to redirect users to external content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely phishing or malware delivery. The numerous embedded URLs pointing to various PDF files on different hosts reinforce this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2981

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://busto-wl.gattinonimondodivacanze.it/themes/userfiles/files/kexebisufigibigumebo.pdf In PDF document text
    • http://www.pattyn360.com/upload/forum/files/4327660757.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/veruzeforegosijesilo.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/dibifebirobinabolilem.pdfIn PDF document text
    • https://linkevicius.com/upload/galery/file/lipazukamikata.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/9992307723.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/rogoketetam.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/79599125183.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/letaxezegewaxisugikug.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/folukebadezavarefaw.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/69864867450.pdfIn PDF document text
    • http://topnotchimports.com/ckfinder/userfiles/files/282242038.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/79234618277.pdfIn PDF document text
    • https://khonggiansangtao.com/platformecom/img/upload/file/57526710882.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a186db07f8---xefojine.pdfIn PDF document text
    • https://botroul.be/uploads/fexonexozejos.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/tuzarekulapifisakelisavuz.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/tixesubagomavaxetemirut.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a1544ed05---ratofif.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/55793881710.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/23519349422.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/68917258865.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/81176766012.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d5b32297d---lupawesabota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=shareit+5.6+mb+apk+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 11248 bytes
SHA-256: dcedef137081f67f7303f1e2db342788af766ffc64d5e5c76395a9fde3c0d31d
font_01_sfnt_off00012239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12239 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A4B 19620 bytes
SHA-256: a7e3fee56ffcb51d6d5a5ecf3b58b31626dcbf67817aec7cb7f1d3502a0c7863

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