Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e40c8eb7755c43…

MALICIOUS

PDF

84.6 KB Created: 2021-09-19 05:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7142d79aa36ae088ad3fb885ba842261 SHA-1: e5d9e4b7c5b263e85fb2fc2a74f4b5dae59f92a9 SHA-256: 97e40c8eb7755c43d5183b121fe2d6e2ac9cef0d37b1fb327ff63d412693d623
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains embedded JavaScript and numerous external links, many of which point to compromised CMS upload storage or disposable hosting, indicating a phishing or malware distribution attempt. The presence of embedded JavaScript suggests it is used to facilitate the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3632

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://inprovitargentina.com/ckfinder/userfiles/files/53742766409.pdf In PDF document text
    • http://ping-property.com/user_img/files/36385676679.pdfIn PDF document text
    • http://getsolarnj.com/userfiles/file/puripesema.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/90690486069.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/45188966393.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/xuxoduturetim.pdfIn PDF document text
    • https://reviewz.eu/app/webroot/files/userfiles/files/mutupavovejiru.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/69114407032.pdfIn PDF document text
    • http://sineadstone.com/userfiles/file/5178233704.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/mufokoluzon.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-9-7/20210907190901226708.pdfIn PDF document text
    • http://cps-mbstu.edu.bd/app/webroot/js/ckfinder/userfiles/files/tufeg.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465f7380038---99441187733.pdfIn PDF document text
    • http://rilta.net/userfiles/files/vutinafarepifipivimatu.pdfIn PDF document text
    • http://centrons.com/uploaded/file/30622707861343a4384679.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbc2e1a735---91321114834.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210904_A207706D826BC758.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/98578442006.pdfIn PDF document text
    • http://mimarathi.live/assets/ckfinder/core/connector/php/uploads/files/rerinabotabikodasajepo.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/73301922764.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/hadgepoltlsdco0lslbo6ufvj3/56924974324.pdfIn PDF document text
    • https://pioneerlift.com/upfiles/editor/files/14815901496.pdfIn PDF document text
    • http://wizclub.net/upload/userfiles/file/6402568951.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ikonik+code+freePDF 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_off00010855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10855 10040 bytes
SHA-256: 93c202bbe3882067f97ccc58feedd666688fc74534a721d8ab87a62164a7c299
font_01_sfnt_off00011eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EB1 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878

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