Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c7f2f5e12102e5…

MALICIOUS

PDF

59.5 KB Created: 2021-09-09 06:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 042e48734a2654801c29b64f2217c34f SHA-1: 51e7391b324f8195c16112e64e44bd40aaf200a9 SHA-256: 97c7f2f5e12102e5027fcc678a60e472dbdd26af51e74365c147c3fed74daf0a
94 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to domains flagged as compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6721

Heuristics 4

  • 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://bakwanudang.com/contents/files/17404243507.pdf In PDF document text
    • https://northcoteplaza.com/userfiles/file/tulagarubupepopufax.pdfIn PDF document text
    • http://athaj2.specialty-match.com/upload/files/zitodamo.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/11484348347.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/jeloxebir.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/jowojekuw.pdfIn PDF document text
    • http://cinebuzz.be/uploads/userfiles/files/sutabegufigowodeluwe.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138aa761e87f---86992844222.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/vaborapinowiwi.pdfIn PDF document text
    • https://maconlux.lu/userfiles/files/xenijodonizo.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612feba3c317d---xalunavenololaw.pdfIn PDF document text
    • http://cartopack.com/Images/file/25378541373.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe1278aab6---lenifivegonorinul.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/pipifosok.pdfIn PDF document text
    • https://dalba.net/other_files/File/90449533565.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/dupatisomonazex.pdfIn PDF document text
    • http://lpxs168.com/filespath/files/20210905230459.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/jowitaxuvoxixubemudizesud.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/povujukatukabedizirukax.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/wedinadesolelodes.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393d38d23a1---jikelutuxoge.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/rinik.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///33695910320.pdfIn PDF document text
    • http://sunil.kr/uploadfile/fckeditor/file/fijokokazedanajefuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+print+duplex+in+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC602 16856 bytes
SHA-256: 0af562394c55132fe79fbeb75857f356c1e53226d7b9c0bf719d8526a9b7081f

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