Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d9c882c40c82fb8…

MALICIOUS

PDF

74.8 KB Created: 2021-09-05 18:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d80035fd8575350ca87357928459d541 SHA-1: 4e6c8532bd93ecf9dba48023656dedca8d229c4b SHA-256: 6d9c882c40c82fb8380c33d582fd2ae42ab6e7cb174cf6c0eae7a4156570c381
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised websites and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely for phishing or distributing further malware. The presence of compromised CMS upload links further supports the malicious nature of the hosted content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3916

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://tgtech-auto.com/userfiles/file/76833327207.pdf In PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/garekake.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/232udsrk74er0umnloimgvud1u/90987219686.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/35221773667.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/gufitapugej.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/728a7c6debbba96396d16e2b853dffad/lawosebavejarumoxej.pdfIn PDF document text
    • http://www.yevres.fr/ckfinder/userfiles/files/kipakafopik.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/2d2c6a2486cdfe12cf7a032be668b469/rumozejuwogowadeba.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160ab21307fe6d---73236394304.pdfIn PDF document text
    • http://montazenabytkupraha.cz/files/file/53441695753.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1610a755e13c28---37843592334.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/77328643793.pdfIn PDF document text
    • http://dxqzx.com/ckfinder/userfiles/files/20210810_230459.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/bamopaweketelebad.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/vijafirewefete.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/5899440a0959cc0ccf7f91666da1150d/jukukugexigu.pdfIn PDF document text
    • http://lhsclassof68.com/clients/73441/File/8803716034.pdfIn PDF document text
    • http://pnlestari.com/visitbali/image/files/fagutix.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/xapapeva.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/jfpjo28nn10rnloadro0ohgpv6/zogevagixatavi.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160c6beaede18c---salagol.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c04db681dfb---wozelivobabut.pdfIn PDF document text
    • https://evermoral.hk/upload/file/1627084177.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/vujowuxo.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094c18f00367---nowakijububosuvoro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=force+and+laws+of+motion+class+9+numericals+solved+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B7 11176 bytes
SHA-256: db40ac1efb7df1c9f0c60f87e18127e50e478d44fbe2c4634c95f59665c057b2
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1