Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce32e7d6fc44139c…

MALICIOUS

PDF

77.3 KB Created: 2021-09-04 04:58:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 66fb60c9410d1aec633b9028f6824e79 SHA-1: 98a35120c80e7e2838433cd61c5e3e851fdaccaa SHA-256: ce32e7d6fc44139c5caf7b9e8a4bdcb8febedd5517e5fa00c0a53e7d0ba91b2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. This suggests a phishing or malware distribution campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://clerus.hu/files/file/44754157290.pdf In PDF document text
    • https://novamakine.com/upload/ckfinder/files/gotikelige.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/79760cbeb3d4d0ebee9069b67583e0d3/pazelunogedog.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/14711cbe6db2d000a6f2736a3bbd68bb/jonolugedup.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a84e4191d16---pawesuv.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/40378453624.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7a1e4d8c0---lagujavosizojekefi.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/30530199300eb2518758c5a4c9f908e3/66025828569.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/95870067832.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091931c19242---zadokog.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/wofilugisasanemipetamotun.pdfIn PDF document text
    • http://richwoods1969.com/clients/861079/File/dadugezob.pdfIn PDF document text
    • http://www.sun-green.eu/ckfinder/userfiles/files/gorilumenigenomuli.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098699085479---54869851912.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/60540500605.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/55505776963.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/vaxezulasi.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/togogosenepawonibopu.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pudonamezituku.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160702329e9081---33525892840.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/66596692718.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/b2833f3f67fe5714c1158f756aed065d/81513719825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=invertebrate+zoology+book+pdf+free+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000c83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 17744 bytes
SHA-256: c947b285e8ebf4907655d66fb3abce0496051d60d6c5baf89826609287302670
font_02_sfnt_off00010ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED0 10924 bytes
SHA-256: 78ce4047eaa02a73bbd9e54281532fcdc8af0a47a35deb8297c7c3400e8f4849

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