Malicious PDF — malware analysis report

Static analysis result for SHA-256 15170f2a5a03e284…

MALICIOUS

PDF

70.7 KB Created: 2021-08-17 15:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 92e163a4c1c2179c2c2f19b74fea8f84 SHA-1: 8e2e9be2647771baa6237fa65bb2c4956e4e632e SHA-256: 15170f2a5a03e2845c15a0e699feed2ab995d1bacf79afc4d2b88630ebd0c707
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or download of further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3771

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://allytemp.ru/uplcv?utm_term=sample+risk+management+plan+for+construction+project PDF link annotation
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/26402d79b064aa650f8a758c6b036f82/48673576169.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/92f9ae09aab29f632ce64e81e3d94609/wewojijin.pdfIn PDF document text
    • https://tavio.ru/files/file/letomidekoxujejaxi.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078a89b85f4d---13178390041.pdfIn PDF document text
    • http://rsentco.com/upload/file/kifubapuxuwo.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45c98121c---96505595257.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd01566a4f2---26798766773.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/v1mbq2l15ebdm66tm92cbj5036/zagiguwefasesukabivo.pdfIn PDF document text
    • http://alfavit.tv/userfiles/file/24030800278.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f9d90b9b15---750996568.pdfIn PDF document text
    • http://rld-carbon.ru/file/97429066828.pdfIn PDF document text
    • http://ikkosushi.com/uploads/files/3975559011.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/nuserifuwukabatageripega.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/91261625676.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/36aad61fc4b66094f3840e06b88b9e7f/rezakavitebumobafata.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/5met9b2oi7nv5rhafcl9d4amlim576qa/20303088979.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/t605ouel7gcthougm8a9r639g8/5527879593.pdfIn PDF document text
    • http://chamdure.com/DATA/files/jasutemizip.pdfIn PDF document text
    • http://nova-auto.com/upload/fufubem.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/19098122336.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/ec0312ef1cf19862d18ece0a5f6581c4/63728306655.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3d451306dd---45155709767.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b21f5d57ea---sibotukedubilogewex.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/89684367355.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210613_8918503624C9167D.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/xujipusutikezakolagapud.pdfIn PDF document text
    • 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_off0000d8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EE 15852 bytes
SHA-256: 57b69ab2ab3b37cfd5631643c1fd4d962ff7810a85edce245320717f59c66437
font_01_sfnt_off0001019c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1