Malicious PDF — malware analysis report

Static analysis result for SHA-256 34e6ac2995b625f7…

MALICIOUS

PDF

46.8 KB Created: 2021-08-01 11:44:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 257f57739aa1519d771c083833ed4a2a SHA-1: 34ea1ece06a10d26ae882373938ec74aafba9b85 SHA-256: 34e6ac2995b625f77485cb63a661437b032416775ab1e63154311ea93d1ae7bb
154 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to other PDF files, many hosted on compromised CMS upload directories. This structure suggests a link farm designed to distribute malicious content or facilitate phishing. The ClamAV detection and ML classifier further support its malicious nature, indicating it's likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://pinzimoniofiumicino.eu/userfiles/files/mugumefej.pdf In PDF document text
    • http://chatfieldfarms101.com/userimages/nepofuvimedunorinulivem.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095df8b3d53d---fafojipevadobugunaz.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b710f1231fb---sulixidep.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/basivaf.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/58784492992.pdfIn PDF document text
    • http://studiozammuner.eu/userfiles/files/zixaninorixinolebo.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/wenekoxijisapisesizovaris.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/39403313355.pdfIn PDF document text
    • https://toptenstudy.com/upload/files/BodyFile__60D74EEEC819B.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe52624c1a---41132783680.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/ad6360fd873015881d5d2d7762a4e0ea/lunuferulobivog.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/zudejutabagobepi.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a148767e5f8---soxaniberokip.pdfIn PDF document text
    • http://avonsteel.com/UserFiles/file/73038372125.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160733b18b713c---95684685436.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/80e942c02e1f710d96d7a1b800f23a19/sezuzurokawuzo.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/pedix.pdfIn PDF document text
    • http://termocity.by/pics/files/bepusafesolulukazitezig.pdfIn PDF document text
    • https://actorconseil.com/files/file/botowozumugoxiw.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609033efea647---21020234643.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079b37b40042---zogusufubabunabi.pdfIn PDF document text
    • http://techbis.pl/files/file/7530236155.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/zosakotetamarogezulipakej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=principios+de+anatom%C3%ADa+y+fisiolog%C3%ADa+tortora+15+edici%C3%B3n+pdf+gratisPDF link annotation

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