Malicious PDF — malware analysis report

Static analysis result for SHA-256 1981806a15315369…

MALICIOUS

PDF

69.1 KB Created: 2021-09-03 05:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d19cdd9663827f184f229a52943cba3d SHA-1: df0575820546ace16eefdc67b0dafddde463d084 SHA-256: 1981806a1531536981d2a70b1ad552b5db726bcf5453821e3cec95d650a7353a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

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://coretry.ru/uplcv?utm_term=olympus+tough+tg-5+manual PDF link annotation
    • https://iqmuseum.mn/uploads/files/56100830193.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/tukakobaravet.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202108242129221978.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/fikukekago.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/movodudi.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608f2003006a7---87587406965.pdfIn PDF document text
    • https://aashianarealty.com/file/75360238067.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fd289be8d---bipesak.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/gubasatoso.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16099485f67f29---59600059760.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8dcb8fb62442fa0920488897df5c3c0f/50178885242.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d787e961305---marowetesurelilijokare.pdfIn PDF document text
    • http://orlickachata.cz/files/files/nefaba.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/juzofisadipupunupova.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/8cgef1k3010r0jbgp8qebro40e/bagovumorarorogumibom.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/28618275072.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8a9b8e908---gasupo.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba79696947b---sopomagukuxozobum.pdfIn PDF document text
    • http://dooroc.com/tk/upload/file/watototipuxololu.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2ddb5461e48d58a3b5e058331990d96e/47848990715.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/45809876317.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745dc754905---soxapatimukunuten.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/37034100117.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pudonamezituku.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_off0000dbb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB9 10780 bytes
SHA-256: 70cde48dcbc825cf01296543cc26967698c57ff160abc66cc59b713170d81af7

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