Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2186abffda791d1…

MALICIOUS

PDF

77.6 KB Created: 2021-07-08 22:36:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d5862b9c1881741b71dbefb95dda771e SHA-1: 67eb019c8ae9b31c55445205720d5ef635011159 SHA-256: e2186abffda791d10fee4e8079cc0e2f134614aa5e31e9e49cf9fb3602838b7f
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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 http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bd03c974a---rapataxigogatu.pdf In PDF document text
    • https://amursvoidom.ru/media/files/7212948945.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9507023f45---84926599497.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/jogiju.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/tetuxadewo.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/1h6hc44ubp9ttm3t790td0urhr/gejaduma.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/joromuduf.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/92987079877.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/ranepevodutivusujokabe.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b815af22648---50157200339.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609866cdb8434---gupirigopa.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/20413146350.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/atctrg0a200u6tga8ogg6jrsk2/fujixad.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/tupozadejiwibo.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a060f8499ba---60569594197.pdfIn PDF document text
    • https://appfacile.it/file/16794917448.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608a70856dd65---32218786106.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/20350238896.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/vizomudesi.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/7218306554.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/c5qnrbub8ki551kpd40cjrl881/vufileluporogoz.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/voretoto.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/8979589113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=wonder+woman+fast+and+furiousPDF 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_off0000eb55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10367 17588 bytes
SHA-256: 729272bff0340240342056abbfd924247ae0eb0ce9ce56d7cbb0452d542fcc72

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