Malicious PDF — malware analysis report

Static analysis result for SHA-256 08348f263441cde7…

MALICIOUS

PDF

169.4 KB Created: 2021-07-27 04:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8b8a5eeb8e93f1cb98329c90fd799959 SHA-1: 5da6b814fbf855ee0e05b5781d480d8e40a4844e SHA-256: 08348f263441cde789442feebd35533283165ae1b185d7cf47c9f789ad067732
124 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, indicating a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4448

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://tese.in/ckfinder/userfiles/files/molimogikapa.pdf In PDF document text
    • https://omegaplus.bg/uploads/pages/files/fodegotemepesawunuri.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/50006342630.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf7c66f2e---xuwipanuvanukutiremara.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24d0f5d133---zerubujubalerib.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/66740555984.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cae11a98b---96800836013.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/12a2a39a7e3b7de519b67b42a71a7782/40079928699.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b40ba8b98ba---kusuposedusatonek.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/24624752190.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c98e080be0d---wakegen.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/deviwuferogipotulurez.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/7770734323.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec115b9377---weladazor.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/72923968259.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608931b5615c2---38242372244.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/91435830669.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/7084307713.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/welow.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098594994b02---56523140810.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/riwagugezofove.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/vudugenofujevaviz.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608689f50fa1e---juxosajubarusakeruvegakus.pdfIn PDF document text
    • http://axwelindia.com/uploads/51171489613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=hssc+group+d+answer+key+2018+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0351e0a85---90425085382.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_off00027ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27EE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1