Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd688adae46b611a…

MALICIOUS

PDF

61.0 KB Created: 2021-09-16 21:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 95c686bcc7d5e518b259c1687b4a8814 SHA-1: 381119696a59fae4599690420bc97978d32663ee SHA-256: dd688adae46b611a85605d69d0b9edaba4b7df65f81304ce4ee57d1a874cd1d2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier flagging indicate a high likelihood of malicious intent, possibly for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5382

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://wastran.ru/uplcv?utm_term=gadar+ek+prem+katha+full+movie+hd+1080p+watch+online PDF link annotation
    • http://www.salpasafarit.fi/tiedostot/files/visatoxed.pdfIn PDF document text
    • https://lotte-ppta.net/beta/assets/file/xalididaj.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138870de247e---tigek.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396bae6dfc1---lozafeseruxarirepeze.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/66936758398.pdfIn PDF document text
    • https://kerryparsonsfoundation.org/media/file/valosulofujejasopuvopise.pdfIn PDF document text
    • https://sieuthimaycafe.vn/uploads/file/93785232171.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/pegakini.pdfIn PDF document text
    • http://aylabawadi.ae/userfiles/file/zoziz.pdfIn PDF document text
    • http://stagegator.scorchmark.com/stagegator/ckfinder/userfiles/files/3874421133.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/muwedexo.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/27664190858.pdfIn PDF document text
    • http://cristal-in.fr/userfiles/file/mudekewosasalijunopevar.pdfIn PDF document text
    • https://anakaygame.net/calisma2/files/uploads/81676985596.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/37387632989.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/jedolodas.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/xubelomutaw.pdfIn PDF document text
    • http://kawoka.com/userfiles/file/nujur.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/93496210015.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/63690256269.pdfIn PDF document text
    • http://heathrowairporttaxi.website/userfiles/file/8964024027.pdfIn PDF document text
    • http://huefpdf.org/upload/file/nogupefovenarorosabeta.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/naxujizuzosegif.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/58127656078.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142152eb72c8---dimigipebafivuke.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/vefodereraza.pdfIn PDF document text
    • 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_off0000be7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7B 11484 bytes
SHA-256: 39f9b93c566fb05159c1eb890cc97d4cd635731ed2630b3762b53652c2786eeb

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