Malicious PDF — malware analysis report

Static analysis result for SHA-256 30a5cc8109e70421…

MALICIOUS

PDF

83.3 KB Created: 2021-08-22 02:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f3066f4f610b8e4b6ab2739ca8dd4646 SHA-1: 93b12b815857d5fbb3196999b94afb643750c74f SHA-256: 30a5cc8109e704213dcf5395f70a3f5c25cadb7409530924ae21e73e1618680a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The heuristic 'SE_DOWNLOAD_BUTTON' suggests a lure to trick users into clicking these links, likely leading to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/d944b09eb92c21259dffb8061d950f4c/48019183697.pdf In PDF document text
    • https://detector-billetes.com/Imagenes/file/pibalazapuzepepekuf.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202108180301343750.pdfIn PDF document text
    • https://bnovum.hu/downloads/38035960549.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/tigexadipabi.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/526b12ca612296e6ee34d4c1d7d0a802/61223326756.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/mirovatuwanumiwenovepuf.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/6d23dcea26e66a4b2cdcf3dbd7faca5d/17547240961.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/darosafogeranerosigiziguk.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/64180117368.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/7265540396c76e138410d4a2abb222ae/dapafenugudubewiju.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/lft2kn7pv94rvgggaje77vem5v/kurosidofo.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/sulop.pdfIn PDF document text
    • http://ned.ru/uploads/files/felenu.pdfIn PDF document text
    • https://www.bevillelecomte.ovh/ckfinder/userfiles/files/supufetizufew.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e01cb92235---96758074242.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f410ebb1d5---17799094766.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e23072844---62248849504.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/toloseditajav.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/45391675294.pdfIn PDF document text
    • http://abwessex.com/uploads/files/gupanewebi.pdfIn PDF document text
    • http://ewtch.com/upload/files/rujupivexawowasege.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/15615136489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=earthquakes+1+-+recording+station+gizmo+answer+key+quizletPDF 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_off0000dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 17656 bytes
SHA-256: 555453bcc91bff1e552e15b68862797945dc3e37f23df5c80f1ab676482eb501
font_01_sfnt_off00010bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E0 11484 bytes
SHA-256: c3250c838c7cb1f64a07ebfa9ad7cb25113d47d7526e4e3b8fcd43f32e049374

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