Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a57be0798c65a6…

MALICIOUS

PDF

64.0 KB Created: 2021-07-15 12:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e804e50fc4e460937e74c939fda31842 SHA-1: 154ac8899fbacda5890ab41ed29dd513b731f55e SHA-256: 57a57be0798c65a66b56e3ecc6f4f6211861a1269ab32d383ee667c22253e7b0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised or disposable hosting domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

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://sns.hu/_user/file/nezerob.pdf In PDF document text
    • http://qca.ch/userfiles/file/3956379264.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/neduto.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160831c1ee58ae---94168171486.pdfIn PDF document text
    • http://ozari-ua.com/files/file/9627036524.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/62039529845.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8893f1e98d---ledetobo.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c03840ab---52348410090.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/wezapasefejetixuzerox.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/r84ndgs3vnmaim5ua0cpc7chd6/salatasofisumowo.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/6ae8e504d168327c647ed310ff568235/boponewujimax.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/e404dbcf1e8d492ecf8cd748af607e1e/mavuluwogajurebikilexajod.pdfIn PDF document text
    • http://shhs69reunions.com/clients/e/e9/e92da0bc0099326815942f81a5c18dfc/File/sazumobosoluwu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/04233849555914747810c51abb70591e/jojozololefafazutudi.pdfIn PDF document text
    • https://ortechindustries.ca/ci/userfiles/files/91811978368.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/28889463377.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/13481669127.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/b72b3ea3ed4f7dc90baf9beeb1041cf9/gozobovexomojanajeraja.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/49b65caab9ac61003b3bf95625523bd0/noziga.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd258a86979---rojebibaf.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/93328732973.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/jvdo810u3i6f27d5kub2ju0kgk/2066286402.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/napanewuwuzu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+slope+of+a+speed+vs+time+graph+is+equal+toPDF 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_off0000d724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD724 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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