Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbee219f445a462…

MALICIOUS

PDF

84.1 KB Created: 2021-07-07 16:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: ddf92855c8cb7df40f204316cee0034d SHA-1: d9a24928afe87cdba98d7d70fc8ae5d077ae836a SHA-256: 0fbee219f445a4622649c3774493d8a6f9e4ba21cb727ffe5d5d3ca5dbde2f29
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with 'csc cyber security exam questions and answers pdf download' in its path indicates a lure to trick users into clicking on potentially harmful links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/f214aa10005434f31946f992dac3c7e6/fowatezukugidopasop.pdf In PDF document text
    • http://arcomproltd.com/userfiles/file/tabalip.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/73261055172.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97607031816.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/90473780917.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607358a4161a0---18547748454.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/lb52m7jtqk0a1qkmmdjglavppq/39286455802.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/067b1fb8964dcddc46412448c13a533d/zixofuzazowajidogexobabu.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/ls382gdto3r4rpdhqke4rotrm2/fitotusivolewu.pdfIn PDF document text
    • https://yellowstonewildlife.com/84548654572.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/vepukagagufadukewesaw.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609303eeeba5b---pugewenevuzasotut.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a261b16a663---mujizabikemarefuwez.pdfIn PDF document text
    • http://njnccualumni.com/clients/0/05/05b55d2c4c342460da0dc2f503861b12/File/fupobifene.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa2d2382ae---vemekoxor.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/tigideti.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d85be1c9ce---kotobanakimanudalan.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/g1tacic62c2uajec8g5r7oqje5/8936849277.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/i0ui638shmpe44add59c9aegm4/42942254444.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/18991018700.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/sidujerudunewi.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/lutaveveboxunixatoluteta.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/b2c17f5472cb625c209a6510737a7a6f/nutewexurefinu.pdfIn PDF document text
    • http://moristas.com/userfiles/files/42394291689.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=csc+cyber+security+exam+questions+and+answers+pdf+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDC 17064 bytes
SHA-256: b2464178998be88842c25a6513a6e5f65188f753769da0b38fc2feb202fe9e16
font_01_sfnt_off0000e34b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34B 16784 bytes
SHA-256: a24f658d08fd07cc46ba81d6014d1356906ac29ca9a70b9d3003a2dd201eac94
font_02_sfnt_off00010eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EEA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00012701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12701 11500 bytes
SHA-256: ddc4db22d041b1e356e86c66223a62a6ec3fc75fca36ff7cbe06bab17f80c0af

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