Malicious PDF — malware analysis report

Static analysis result for SHA-256 f56e2aa5d7396d92…

MALICIOUS

PDF

71.4 KB Created: 2021-10-02 15:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4788112d28ddecfb55f98dae6dcc7583 SHA-1: ee9082c278e6b16b740e8a5fb2b026783c8542a8 SHA-256: f56e2aa5d7396d92bbee596a3d5b7ffc6396ef0fbaafaf6332d5a2f4aaa6977e
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by both ML classification and ClamAV, with a specific detection of 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm, directing users to multiple compromised or disposable hosting sites. The embedded URLs, such as the one hosted on 'onegelha.com', are likely intended to lead victims to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/b8f3681b83f86b3186bdcd91fab86eb8/vuriveguxogolurexobifa.pdf In PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd1ca47667---maxexowidelurixo.pdfIn PDF document text
    • http://edallyshop.com/upload/files/74799869077.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/fekovivujatebewefozed.pdfIn PDF document text
    • http://indemo.pl/Image/files/megolemavosipusasek.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/84776553405.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/79727763695.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/vibafutakixanan.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/lekovudevaxazobalo.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161377b6ed295d---61769898003.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/pevit.pdfIn PDF document text
    • http://valentine.tutaylamhet.com/storage/ckfinder/files/fakulemafipedakavu.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/jajotipiwug.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/suxopi.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/nivigabagap.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/f0c819b27064a4cbd4492e249b7600c1/buzitabupuwezefifabi.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615126fb34d12---zasimukikijejegexewep.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/dijedu.pdfIn PDF document text
    • http://storemisr.com/uploads/files/lexezufufelami.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109250534589739.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/zeziletos.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/finuledawederuxiniwexotup.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/206314018.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=quotes+about+your+crush+not+liking+you+backPDF 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_off0000b0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C5 18020 bytes
SHA-256: a17400937aae6313b8be25c2751881bfaf23d2c07d9fa51ed2cb6d834eb65965
font_02_sfnt_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 11012 bytes
SHA-256: b033c5d02080c2e3baf144a945e4740250f6fdef9866565d204cbef07efb615b

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