Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd148337beecfd30…

MALICIOUS

PDF

84.3 KB Created: 2021-09-17 10:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7287e7c744d59e5388dbe2c018cc0cdd SHA-1: 1c22bc22f44aa7832d9668b7a253262775b3d7e3 SHA-256: fd148337beecfd30ec202e224128b8c9d3576c699190a58d4af1977c04694b5e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious by ML models and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that likely lead to phishing sites or further malware downloads. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, as these indicate the document is designed to drive traffic to potentially compromised or malicious hosting. No scripts were extracted, but the document's structure and embedded URLs are sufficient to infer a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=shutter+island+full+movie+download+123movies PDF link annotation
    • http://skonasystems.com/userfiles/file/34319323773.pdfIn PDF document text
    • https://dongciao.com/uploads/files/202109011320468068.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/gesimezeneniwibuvadora.pdfIn PDF document text
    • https://markiza-trade.ru/admin/ckfinder/userfiles/files/ragotaxuleveruzesuxik.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613caaabbac95---bipovigofokuzixogigokupo.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d4533345a---tezapedewitogaxopisug.pdfIn PDF document text
    • http://npas.ru/pic/file/varajanarekomuzuzabudu.pdfIn PDF document text
    • http://baby-daycare.com/uploads/files/202109040604215902.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161371df263b17---12615552646.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135070f241fe---lekamogudasapakafobeva.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/kunupoxewizonaka.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/19513978909.pdfIn PDF document text
    • https://nurdagihaber.com/resimler/files/taralaki.pdfIn PDF document text
    • https://hefcom-hydraulics.com/ckfinder/userfiles/files/67784120319.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/73281289486.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/3836154f9dccefbd9beed409ad29886f/zamudosurimiwakosidiru.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/pavuvudonesa.pdfIn PDF document text
    • http://police8coop.com/UserFiles/file/gipakipiwobivunodawexi.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/84750086919.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/lewagurunotofolag.pdfIn PDF document text
    • http://upasamed.org/Content/uploads/files/rakabijori.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/zijokasuvufisevubisiniz.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202109041029438467.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fbd2272087---84786010358.pdfIn PDF document text
    • 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_off0000e432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE432 17256 bytes
SHA-256: 7edd18aa589f8170a6ea05d14e687ad2088b9f3162f833e817deb5c0bce6cb22
font_01_sfnt_off000110f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001290b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1290B 11292 bytes
SHA-256: 814fda3a8a89dd3f8ca577fbeb94f41e9b685f8627204c69630c5d7285a0e763

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