Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24d02f5bf3fa5d5…

MALICIOUS

PDF

76.1 KB Created: 2021-09-04 01:02:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 90ea0717b449331c93bc41596dae462d SHA-1: 9c860ecc39bfd0147bd3eb91fecd8320cf053264 SHA-256: b24d02f5bf3fa5d58abfe752e72bd595e7450aae7f722e1bf2412f6f8a370ebd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of external links and the overall detection profile indicate a likely attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/diralowuporegerilowewifo.pdf In PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cc53d24db---39224374413.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0616240c0---34866836810.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/zaverana.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f701b32664---kewaserexime.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/64b495cf5b5b67a0219faf50f2d9e4ef/sewasatizawumexip.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/90a35b8ef23ab7c833be5c6d1ffb80ed/17332162686.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/87bebe6a02085de090e5606ddc08b9cf/16290317308.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/qtcv09oonn9bn52him9uk1nfqm/disuw.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/54920814276.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/16475880993.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/files/96962818736.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/67456950547.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b6425f4d7---jogemir.pdfIn PDF document text
    • http://talleresjpg.es/img/file/zepaw.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/90323e924cee22f9b463fdf2089834f1/45167284223.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/zewipefuwipug.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/68662709742.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/7919496461.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/pagitasabekura.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f2fc6b1dc---bemomuzofawon.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/rirodefisabamokubopab.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/zaligorivosejalom.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/raveluropefidine.pdfIn PDF document text
    • https://energooptima.hu/upload/File/94489503846.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/bivexanekugun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=ramazan+yetgin+pdf+notlar%C4%B1PDF 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_off0000bf05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF05 18744 bytes
SHA-256: cdd878027271fd5ca8ebb6d740c93d6454826dacf17472779f76e8cc9b0f8b24
font_01_sfnt_off0000ef6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6E 10936 bytes
SHA-256: f77d89237126185f1f3809d2b707f63d331ccdae55de176c81b8d09aab3e2ed7
font_02_sfnt_off00010889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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