Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aad3f7ca9250d4b…

MALICIOUS

PDF

87.7 KB Created: 2021-08-06 10:03:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d97e8a80385675abcd0874e9709e2995 SHA-1: 4560f269fc62e4eeec9ae1d763b7f171a51e9729 SHA-256: 2aad3f7ca9250d4b0fdc398acfe2e4f54b24687001703ff6665aff62f5fccfe9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and does not provide direct clues, but the heuristic firings confirm the nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6240

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 https://automatisme-portail-bordazzi.fr/fichiers/67363780198.pdf In PDF document text
    • http://mlkscholarshipsmilwaukee.org/clients/f/f0/f021f13c5c598389be7e913a1ae626ff/File/49171540469.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dc878d2c2---jesosavuzotefu.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c343a18d9---65084553501.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/88291786076.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/55680366071.pdfIn PDF document text
    • http://generaldistco.com/images/file/95092162203.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/49372641879.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/nenofojoxew.pdfIn PDF document text
    • https://svltv.in/userfiles/files/kutenerimorimo.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/70324514718.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/balenosira.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607fafbc16054---9105435463.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/betatafunigorifege.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/zupizuputaposovorexifagog.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/2e5e534ee3d25f003c95de139b0904e3/rujikokade.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/pisaxo.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd460da214---kawizikusadaw.pdfIn PDF document text
    • https://absolut-fit-and-dance.de/wp-content/plugins/super-forms/uploads/php/files/rre2tap6jbepk8r33bnorhkbg3/10141164514.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/29128061496.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///nupofibarogazagupa.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a01ff40d3---96263801026.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/s06oec4spkgu35fmp66lutmpd5/86548447702.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/dizarafuwuwegevowoserodo.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/mabewezozimorokoved.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=topics+for+story+writing+for+grade+3PDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/tijaki.pdfIn PDF document text
    • 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_off00012d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000145a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A2 11084 bytes
SHA-256: 4024e4b8b854da4aad08c9badf0f9e79d26bdd47316f3a39a955c382c766bda9