Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bc10c15809b191…

MALICIOUS

PDF

76.0 KB Created: 2021-09-18 15:31:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: c33709a51bd25cf5001ad593cdad86f7 SHA-1: 1bcc615e4a2bb991b98ade03da90166cf38f5e4b SHA-256: 32bc10c15809b191710bc5e399c97a98b141a6f6be45c942d8b3d24a3392b0bc
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates malicious intent, likely to trick users into downloading further stages or visiting malicious sites. The embedded JavaScript is likely used to facilitate these actions.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3127

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://turatabor.hu/media/nekifobegubiduxokufo.pdf In PDF document text
    • http://steakclubhn.com/campannas/file/33052832053.pdfIn PDF document text
    • https://i-try.tw/upfile/files/2021/09/16/ponabuxamemiborop.pdfIn PDF document text
    • https://hazeloyun.com/calisma2/files/uploads/xiwerar.pdfIn PDF document text
    • http://firegallery.ru/img/upload/78851952297.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/15869790793.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/161409ad63ae1a---55891611166.pdfIn PDF document text
    • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/963663391.pdfIn PDF document text
    • http://www.biogreeno.com/cms/ckfinder/userfiles/files/77400928810.pdfIn PDF document text
    • http://nuovartea.eu/userfiles/files/pogodoxewovugonov.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/jivuduj.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/tigudivu.pdfIn PDF document text
    • http://ekmeta.lt/failai/file/mutivifoxejar.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/dezejug.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16133ea06e8e24---gujisegudexekelisadiju.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/devevebofasebizuzuruj.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/5760119421.pdfIn PDF document text
    • https://mogilew.ru/userfiles/file/nugurusajozunotes.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/xisotemik.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/49385183415.pdfIn PDF document text
    • http://1544-7419.net/upload/fckeditor/file/porigon.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/ljr15pl7igf8nuqve7tbr5tnlb/98676651290.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/rimonaxiseviwud.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/15566144602.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/muzotamekaw.pdfIn PDF document text
    • http://micruts.org/userfiles/file/fegowufub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=minecraft+dungeons+android+free+downloadPDF 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_off0000db75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB75 10832 bytes
SHA-256: 65410f3327d3fcd1871c01484e6640da651b6dbfb3b92d9cc4efd3d4ab139261
font_01_sfnt_off0000f473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF473 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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