Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d3792ff7f3c7066…

MALICIOUS

PDF

76.2 KB Created: 2021-09-08 09:02:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b9078cb8db5d36ca6837dbbc8a894069 SHA-1: cb4d47d9f2b20b3f0c726b819ead2bd05654d6ef SHA-256: 9d3792ff7f3c706687b5ae7a9bcaccb018b691f163118aaf2195b31ff76743ed
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the classification of this file as malicious, likely serving as an initial lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5631

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://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abce2c5b125---66733962438.pdf In PDF document text
    • http://emirates-offshore.com/uploads/image/file/89274568333.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/sulokizerefowuwunaxuxato.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/vavuvorixe.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/dorosenagonilemipobivuv.pdfIn PDF document text
    • https://ijaetis.org/ckfinder/userfiles/files/55173410986.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/6daee18bcf11a37d7f39a524543f8474/jekozaziw.pdfIn PDF document text
    • http://www.radeton-cz.vasestranky.cz/ckfinder/userfiles/files/lanozofakirowibukemi.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/76060076771.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/sogenenavil.pdfIn PDF document text
    • https://kampusogrenciyurdu.com/file/buwafabav.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/24937290378.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/gopafej.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/9llgno6dhq9m3evt9onnb38s74/bokuxesusi.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bc4f66dbdb3---gijujazitax.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/63944635844.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16090801f654b7---24632721544.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/23007391064.pdfIn PDF document text
    • http://refah4ter.info/basefile/hotelrefah4terir/files/segovisifane.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3218047dfb---35224632830.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/lafanema.pdfIn PDF document text
    • http://ithaca1966.com/clients/8/85/85e9e0a76fddb83d7689cebc6ab07fae/File/kepololojalodulotobada.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073b8c616a66---zuxor.pdfIn PDF document text
    • http://hoangle.vn/uploads/userfiles/file/gawujitodekonegodiw.pdfIn PDF document text
    • https://artofsurfing.com/preview/ckfinder/userfiles/files/vozutifokef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=contemporary+approaches+to+leadership+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DA 11028 bytes
SHA-256: c6754d06e03a4303441923f0cc5a17007cb772d8b8ef4c8c8a12b8fed6e1cfef
font_01_sfnt_off0000fd54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD54 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1