Malicious PDF — malware analysis report

Static analysis result for SHA-256 389dbe538970518e…

MALICIOUS

PDF

103.3 KB Created: 2021-07-26 01:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6365281d80df2a63c5521417f57d4eab SHA-1: 6674a729717d2500ada1974bc9737ec159e758dd SHA-256: 389dbe538970518ea34d308d58017786b9bea110c849880bb1abc414663372c7
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple external websites, some of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or redirecting users to malicious content. No scripts were extracted, but the structure suggests an attempt to leverage external resources for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://kpdb.org/userfiles/files/niwexaxumakopoxepanep.pdf In PDF document text
    • http://vom-ragnaroek.de/uploads/file/kuzitesukedo.pdfIn PDF document text
    • http://boldogelet.hu/media/jobeda.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b731be78709---sejuvip.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/62393804036.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c21fc0c2912---zogupuva.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/67004398640.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202107062213469443.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92902b552---32272652864.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e24fae10693e3398c4d6310507426425/nezufiwutixevobejo.pdfIn PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/rolovivuvupawulugapoduki.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/vvckbq1it9fsmvu20dk316d7db/lemug.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2929ae9699---vegetuduxavi.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/195c7d9e903678b974922c57c6451bf6/7328396699.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/23432646388.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user///file/_0099539001625660378.pdfIn PDF document text
    • https://flyags.com/editorResources/file///sawedelezugalinodufefuk.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090f284982ab---paxamaro.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/31376811744.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a568a341127---jejop.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05fc7ee983---tekumisowodafasufi.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/warelepowanaber.pdfIn PDF document text
    • http://uekekb.ru/!upload/files/xafewedador.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcbe303800---roleniboteruvumuxir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=what+order+does+the+titles+go+inPDF 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_off000110cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000128e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E3 10520 bytes
SHA-256: 27a3b1df3019e10389d516a04b6d078deb7dbb0af4511cd23457468af0fda32c
font_02_sfnt_off00014093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14093 17544 bytes
SHA-256: 91bde2f2559b7448cc02d62cb7506ff66c0dd6dc6c81851b87c7a8febc67b026
font_03_sfnt_off00015b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B46 18884 bytes
SHA-256: fcd31c8e703ad5957243e46a21f91066960711ad53ef904c97f3a4afec714f0c

Open this report in the interactive analyzer, or submit your own file for analysis.