Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e03ece9d54c7451…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 13:30:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 87913107ff35cfbfd4d9b084a7dfef94 SHA-1: b788ac0371617ecbe551ebfecd92028cdcbd9489 SHA-256: 3e03ece9d54c745157ad2e28c7a24865c159ca8a4ef41429a4311b9c8ef3f2d1
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting, indicating a link farm designed to redirect users to malicious sites. The presence of these links suggests an attempt to lure users into clicking through to phishing pages or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85d3963ae---sidifupoloxaxuvosadebekem.pdf In PDF document text
    • http://camel-republic.com/media/userfiles/files/laboxabaluv.pdfIn PDF document text
    • http://petukmahaaaraj.com/userfiles/file/nanarobemivigejupaloni.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/4tjo4eajks9h538et5lrlkhhg2/97540658607.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a80fbc0fdf1---gamatamitojevumetinizame.pdfIn PDF document text
    • http://novo-foto.ru/ckfinder/userfiles/files/69899534078.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160dfdb83a5b4c---duledatur.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f46de3e1f---17331270297.pdfIn PDF document text
    • http://winso.tw/userfiles/file/36164122177.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/pivafefonokogorubujiwewij.pdfIn PDF document text
    • http://koszyczarek.pl/userfiles/file/2486092243.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-5-28/20210528084709941786.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/nr1g40f7aqrpcp28lg0ejbkk70/zuwolatejerimazojarufixor.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/tabazotixo.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/23243489908.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/pijaxoxapemapatuji.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-07-29/images/files/62232851395.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111951c48c18---69990376837.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/feginuniteduxo.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b112c4203---6540530376.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/betexeviwotadobejurorijo.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/a9ed8194d075da57bab4b0fe5bc6687d/41790330393.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/lvllb4aq7rrieem0q29n29f381/66165914332.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202108272052484124.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/24506731686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=reference+letter+from+previous+employerPDF 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_off0000e7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF7 10804 bytes
SHA-256: e5687914877eb34e1a0ea2d2e47f404b5ac4da7baeb9b5048e166058143d2d5e
font_02_sfnt_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 17644 bytes
SHA-256: 8209ce87df7111c0b445a89a1f84277d144113b6cbdfe7cca3c95608856e7c73

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