Malicious PDF — malware analysis report

Static analysis result for SHA-256 750e54de946fcb1f…

MALICIOUS

PDF

79.0 KB Created: 2021-09-13 15:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6921b258651899f88c536aac48127446 SHA-1: 7238c807eee3691b3b0c3955508be45c1e765d3f SHA-256: 750e54de946fcb1f4b4c8f8d30590fc8dcc49bef0b9798eec9818e595881b997
124 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, several of which are hosted on compromised WordPress sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely to lure users to phishing sites or download further malware. The document body is unreadable, but the heuristics and URLs indicate a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3239

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 http://twtime.com/uploads/files/202109060328272454.pdf In PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/09d8907460827e05a5c7ac7867cee18b/sojogeguduxanepirujegem.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/kanegazolopugawiz.pdfIn PDF document text
    • https://zoldlaptop.hu/ckfinder/userfiles/files/peximupoxamuwawepapete.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/72872623072.pdfIn PDF document text
    • http://metzlerranch.com/userimages/89772613606.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/webopuxuperamurowak.pdfIn PDF document text
    • http://abwingstop.com/uploads/files/84566400458.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/18524281245.pdfIn PDF document text
    • http://ad.ditroinfotech.com/laportal/ckeditor-ckfinder-integration/uploads/files/71312414510.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/97090223475.pdfIn PDF document text
    • http://nzozkrowodrza.pl/uploads/editor/file/fubelaxibenemilo.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/nuhdhtj35a20kf0cddua8anekq/zukijiwamebepiwoxitu.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613af6b60f0f4---nomijowigonemuwonutugibe.pdfIn PDF document text
    • http://youzedu.com/ckimages/files/20210907045922733059.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/pamanigiditikedun.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/94248509029.pdfIn PDF document text
    • http://topup-fight.com/ckfinder/userfiles/files/47651224008.pdfIn PDF document text
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/baxufuvurosa.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/11647769043.pdfIn PDF document text
    • http://ladispensadicampagna.it/uploads/assets/file/27822945787.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210908064556.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613726904adbc---72838538960.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/manojixafepe.pdfIn PDF document text
    • http://gr-chem.com/upload/files/61950366241.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+play+harvest+moon+on+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 16148 bytes
SHA-256: b17e3c388ca520c70044df51a505a8c8de3d1ca9b2e495c629779bc8d31aca59
font_02_sfnt_off0000f08e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08E 17220 bytes
SHA-256: 3410cc77e27d735604c3db03bb04341e04c6c7607cdfaeb0202f010fa10f6d7a
font_03_sfnt_off00011d65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D65 10912 bytes
SHA-256: 941c8467851822cdae4dec9aad5bb3de653c6fa99af93fb967f8c2729fa1009f