Malicious PDF — malware analysis report

Static analysis result for SHA-256 948455dc8dff673a…

MALICIOUS

PDF

72.1 KB Created: 2021-09-17 02:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d9c283af9e966c38f7d8359b2df0cceb SHA-1: 7c675af8a1d5ed90e88bba42c577eb92233a9394 SHA-256: 948455dc8dff673a38fc1d90f9f08a1749cfb82a786305d889f61449b0580b2f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm for phishing or malware distribution. The presence of 'utm_term' parameters in some URLs indicates tracking for malicious campaigns. ClamAV detection and ML classification confirm the malicious nature of the PDF, likely serving as a lure for users to download or access malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6016

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 https://allytemp.ru/uplcv?utm_term=super+oofio+64+game+download PDF link annotation
    • https://szelvedojavitasmiskolc.hu/files/files/rozero.pdfIn PDF document text
    • http://chargooshads.com/images/upload/files/81410976544.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/semixetukot.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/vowajusizoxi.pdfIn PDF document text
    • https://mkart.it/uploads/file/tisukibesonutifepa.pdfIn PDF document text
    • https://zhansq.cn/upload/file/9025762890.pdfIn PDF document text
    • https://bataretak.com/img/files/file/64985158325.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/43647769421.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/fesozesufuzut.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/lesapabotoli.pdfIn PDF document text
    • https://feldmann.pl/userfiles/file/75148753601.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/navatatupijanap.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/waxojaxiwibaxeremepenig.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16143bc72b6ca3---jiviwagiripel.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/39994161643.pdfIn PDF document text
    • http://tentauto23.ru/ckfinder/userfiles/files/15243346761.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/zaxesozosa.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/br3vd1vkqigb39f93beajpsiig/67973878174.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f05a859ee4---jujupenaworat.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/jibarobabutope.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC67F 16684 bytes
SHA-256: f84d9f098f03003a689aa5af6e1dc969ba79f3e3119bef37f90222ebcdb4f8ea
font_01_sfnt_off0000f192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF192 11080 bytes
SHA-256: 58e19e5a6ac675870ef9368312ed6395c46fb2384786b55e8b1ed972c8666e77
font_02_sfnt_off00010b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B46 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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