Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee63add269f2ae5…

MALICIOUS

PDF

82.9 KB Created: 2021-09-17 23:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e0e7a68c9a787b855732d168995d1436 SHA-1: 648027d25745b811f327f372f13f68133c9d584c SHA-256: fee63add269f2ae5d735e908ffe5d29109ffcdb01c36bc5b01eeaadafbe87dcc
156 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://carmelocuritiba.com.br/ckfinder/userfiles/files/33470081053.pdf In PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/dufusumasegizititoke.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/77382719391.pdfIn PDF document text
    • http://gaziogluenerji.com/images_upload/files/bedojikomilabowuf.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///fakobaxezeloviguteledopew.pdfIn PDF document text
    • http://khocabien.com/uploads/files/zibazifurodurukupapujuto.pdfIn PDF document text
    • http://liderzy.natura2000.pl/imgturysta/files/wetet.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161401d6cb161e---zupanujorakekowetege.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/57137026734.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/35605158517.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/14795533129.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613754e4be181---75434382643.pdfIn PDF document text
    • https://10s317.com/uploads/files/202109081719482214.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210902211712.pdfIn PDF document text
    • http://putzlappenborner.at/editor_up/goreni.pdfIn PDF document text
    • http://newabel.com/ckfinder/userfiles/files/kokogaxonuburoxegunonam.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/13024124322.pdfIn PDF document text
    • https://tch.lu/files/files/72747132265.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/65780374712.pdfIn PDF document text
    • https://motoralbini.it/files/file/xawofabopewemadaf.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613a641457b3a---18830003417.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109121127133956.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/73808633593.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131a62b94ebf---dodukisevajewemaw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+unlock+a+phone+without+a+fingerprintPDF 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_off0000dd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 10860 bytes
SHA-256: 02b9a700b9abf172a656ec55fe8fb606357187b70b815d0f27b507f3ba416d93
font_02_sfnt_off00010eb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB5 18224 bytes
SHA-256: 5beba0592fd8ecffb765f47d976fccbc7aedac12d470c37b996f807cbfe1ee26

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