Malicious PDF — malware analysis report

Static analysis result for SHA-256 910d7d47197e802b…

MALICIOUS

PDF

70.7 KB Created: 2021-09-04 12:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e310a7ed6496847aed96e8961ed7437c SHA-1: 936f6462e03ba141e130577f750d5081a22181ed SHA-256: 910d7d47197e802ba5c6d2c318a0fd36fb1b91ec4c4b87e0b868209bb844a3ef
154 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple URLs hosted on compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the structure suggests it may exploit PDF vulnerabilities or rely on user interaction to navigate to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7476

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://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/eb96f7381cbb994706713e6949563710/sojasudisimetidina.pdf In PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/15df433e0e9f15744da043fa8393a7d7/29260948804.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/15815863800.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/retomofeze.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/dazekuluzuwomobizumi.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/kukunizojenifa.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/52846936550.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/1943381530.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/5da7ed67ed4ba8497dd457401fdef57b/44848980133.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/98255563618.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f8f8b4fcaf702465efe0c7d7d7eb1ec7/mikapumuligotoludavukis.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/telorev.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fee1ac92a10---3962171977.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/10615714955.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/69107552625.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/jisinezudedakefe.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202108152217167368.pdfIn PDF document text
    • http://schodylux.pl/userfiles/file/78363123476.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f57d7a3ef6ce927a0f16a3c246e94648/puzurebaguk.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/16053876473.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/84156469523.pdfIn PDF document text
    • http://savemaxint.com/files/file/29172534876.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/i6flk93pueh602be2bhni7i4e0/58045531616.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/mopobitop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=esercizi+articoli+determinativi+italiano+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_off0000d85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85E 10888 bytes
SHA-256: 68be2e6493806e4be7244bee7ab7d7fd842833cf5fc0c6b5109370af694efa6e
font_01_sfnt_off0000f190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF190 17068 bytes
SHA-256: 66296745e98b2fb06eb1cbec6f450b1985e16a647fa41aa969d68f1c274c89d0

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