Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea1d89d136995a7…

MALICIOUS

PDF

95.1 KB Created: 2021-09-03 20:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9ef601e02827ffba1bae31f969696b5f SHA-1: 570d1476e824a000542a6d782bbca6cbb7679e03 SHA-256: eea1d89d136995a786d1395718a5120778bc8c85531791a95b7d5f4427331d75
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous URLs, many hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ddba7a287a---77744043008.pdf In PDF document text
    • http://delshadian.com/public/userfiles/file/51722756523.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/79066687219.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/tabokoragavin.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a972e0372fb---77086739216.pdfIn PDF document text
    • https://alariel.be/userfiles/file/fiwusulorarivixo.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098e57fc1c81---lujoregagibovoxu.pdfIn PDF document text
    • https://daxitrip.com/basefile/daxitripcom/files/golavevexiwewimurixuru.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16096863ba10bd---sizebuzedobixibumuwu.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/nr2lagahivcee09fpfq346rbg5/28630430442.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a03e20ec660---83700955669.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/35333690458.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8130c3b6a6---91589374263.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/tikakatofemutotikazokeg.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/nanil.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/74410521915.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a66f0b2d5d6---josuxolilasusajepi.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f89811b94---siwamorilovifuf.pdfIn PDF document text
    • https://www.tahitotfalu.hu/ckfinder/userfiles/files/6824614013.pdfIn PDF document text
    • http://globeksa.com/ckfinder/userfiles/files/2011573304.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/97695191f2b6a954a82d64a058f309d2/zufuwubidevowavelawen.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/48952021592.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613000e12b75f---xiruvovojenewilekomugu.pdfIn PDF document text
    • http://weighlessthisyear.com/ckfinder/userfiles/files/20470610836.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=rainsoft+ec5+owners+manualPDF 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_off00010b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B74 18688 bytes
SHA-256: 629eec2950b8e0bae5eb94b527f1189f55d083608d00e0571042a1833a96e07b
font_01_sfnt_off00013c16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C16 10864 bytes
SHA-256: 3e734934a5293d2d499e7eb0d70f8909abf6f2951b02971a8065f987a2646f3f
font_02_sfnt_off00015550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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