Malicious PDF — malware analysis report

Static analysis result for SHA-256 e14dfe440196e287…

MALICIOUS

PDF

55.0 KB Created: 2021-09-21 00:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6b3d7354f373d683c212a10d4be60b68 SHA-1: 3f4208ced134133750bf1e68b0729b4a2aef514c SHA-256: e14dfe440196e2875d902f579bea04a6d81fb195971a0ddd6def505cff50089b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm for phishing or malware distribution. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or trojan delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7791

Heuristics 5

  • 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.
  • 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://xpeedon.net/userfiles/file/20210902063350.pdf In PDF document text
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gafij.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/zewofimebikuragole.pdfIn PDF document text
    • https://phuquiland.com/upload/files/tizopekimidobozamepap.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145ad4b8b638---49404875612.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/46289653323.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/43164590011.pdfIn PDF document text
    • http://quranday.org/userfiles/file/vepobazasidijosiwut.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/57682740166.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16148c2ef3bf3f---dexixoxego.pdfIn PDF document text
    • http://splogservice.ru/content/file/xubejesufiramuduziwat.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/92641453301.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/95137038895.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/75279744397.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/161353f2b640eb---juxedizabolipipuresesax.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/zavovevixadujeta.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/nufivukalidexezex.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/kumumifiziwi.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614481d35b3e4---77585742132.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161350decccf02---bidivevodowamob.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210906135829.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/42448715357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=clear+pdf+passwordPDF link annotation
    • 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_off0000bc90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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