Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9407db193c7b00…

MALICIOUS

PDF

79.0 KB Created: 2021-08-11 09:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3f77c34de16a42f51cb3d7862b5bf887 SHA-1: 862cc1acd0b901b68007b4cbf7733c76acc5b7fa SHA-256: 6d9407db193c7b00f650224ac4ee13dc01f36d12756645b01fb6f1911fc99dd7
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and multiple external URIs, many of which point to compromised CMS upload storage or disposable hosting, suggesting 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 lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9055

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://phantasos.org/userfiles/file/wufotugod.pdf In PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/69144038249.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/xaxuxoponejovapomewokat.pdfIn PDF document text
    • https://ehlibeytalimleri.com/resimler/files/topiputexiwi.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/fowinevabilo.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/d422f73f907529fb3c8cbf13ab774f01/97674154823.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/sefitajifunibudosax.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/fazejuzipofovug.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/wesujufumikavorubu.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210723_F5573567650ABFE8.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b451ca1035f---ribinepetak.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b059d817aec---xufenezapogogutap.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/3ce66c218486c3793e32f52ec44bdd60/81116462746.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6e0b55d6a---ledibezo.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/11918085822.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608289f152fe2---jetekazoriro.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acd29934d7---5791562767.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f82cfe65346---12509934170.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/sujokozozil.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/57487714706.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/raperufadativike.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a158ee1920---81239637889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=download+sony+vegas+pro+11+32+bit+full+version+freePDF 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_off00010277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10277 11524 bytes
SHA-256: 4e0920e60840a7b4ac663a34703907f48372bc92184f9a72ce21d5e4dcca336e

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