Malicious PDF — malware analysis report

Static analysis result for SHA-256 44dd3cb7dc60af28…

MALICIOUS

PDF

88.8 KB Created: 2021-07-31 13:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1f398615a159ce9b6d577eeaab79e795 SHA-1: 3fe71da7206a463a9516a546d88bc078f24a82f4 SHA-256: 44dd3cb7dc60af289186f5de8a40a1a458bc7f66c68b22619ab879c3dc3b30c3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1055.012 Process Injection T1204.002 Malicious File

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to host malicious content or redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9599

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://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1a869b2e4---69885704799.pdf In PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/d23ef92820e1a9f40a8a4b9dae290385/39858640969.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/zoveregakekoderudeduxot.pdfIn PDF document text
    • http://drivingschool-brno.eu/files/rubixa.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/78817713586.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/dudopirabadifapovexu.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a86586c2ebf---71882190230.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/bemukigenudopamivuw.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077678ebd0e2---zosek.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/muvazolebo.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/a0d13f9718a2b696813b6c44e5d6fafa/tafuvexavogobaguj.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1e990761eb---18989368428.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/146842541260d62ac040dcc.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q7mll7ou88nfrj83a7c1j9h1u4/39450699789.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/nunirilokofabotorutos.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/dd07ov4g4c4j92453vhq068nmk/wudinotosoxi.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/xixiposorawute.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/83098736940.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a273c3594---32846458184.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/76e1e22f316760ec2fd41b24bea3deae/64573125003.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/jisarimugepo.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5bfbe2a5f---lutilivagenilobopiduwap.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ac85d80d2---fesutipitu.pdfIn PDF document text
    • http://fullx.net/files/fisux.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/7186889954.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=dr+fone+descargar+full+megaPDF 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_off000119d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D8 22012 bytes
SHA-256: 9e87fcb9747e7fabf3f0d32d35813475268ae8204ece97dcf1a982fa03ee7a17

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