Malicious PDF — malware analysis report

Static analysis result for SHA-256 a136c4d22374df54…

MALICIOUS

PDF

62.3 KB Created: 2021-08-07 11:26:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3f5c24e4af05268fa63e996598e5ba8c SHA-1: a163128dc7ea17e8f3d6986a3036d57bded2ec75 SHA-256: a136c4d22374df540a6f4351c7836b2c6d175c4e274eb7ce6f57008a293be6e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The embedded URLs suggest a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8636

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/f50436bcbfbca1ce3f63d249795ece45/jewukipavajetudone.pdf In PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/32988580815.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/ronakejix.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf4f75b265---melowolemig.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/46528400617.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/gasomalemujexinanotubigax.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/591ca0590109c9a9e7b4abacf9055ffb/13255320848.pdfIn PDF document text
    • http://palami.by/images/file/76820341959.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/ketiv.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160be82f7d9bbe---luzuwenig.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/nokororupamufafotixip.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/jazemavegagudukomuvutiga.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/simorezosajisalarej.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783c0b88926---96413838525.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608808e22f31d---45077960487.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/94513196917.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a43dd0ed---87477041411.pdfIn PDF document text
    • http://idcla.net/upload/files/98552914604.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/mupaj.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41c97e398b---62330207950.pdfIn PDF document text
    • https://susta.vn/userfiles/file/13979029100.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/92809500821.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/pumizisavosiwaxu.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/kaxilitidivuvawiluwep.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/2459974407.pdfIn PDF document text
    • http://essuances.com/ckfinder/userfiles/files/91186628808.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=agriculture+business+proposal+example+pdfPDF link annotation

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