Malicious PDF — malware analysis report

Static analysis result for SHA-256 702748f532304c2f…

MALICIOUS

PDF

80.2 KB Created: 2021-09-04 14:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e6a0cfaa40bd9abbe200d9f8f5f1b05 SHA-1: 8c84c5f4c8131191496f1758660eb1dc8a978826 SHA-256: 702748f532304c2f86c15bfea903b50bf44861ac5ddaf99679e99b1563ce02e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of using PDFs to host a collection of links, likely for phishing or malware distribution. No scripts were extracted, but the overall structure and heuristics point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://oniceh.ru/uplcv?utm_term=le+verbe+aller+exercices+pdf PDF link annotation
    • http://dgjst.com/upfile/file/tetitupozejelutul.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/e74beeb73cadd39c80491371cbe070a5/47279728676.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077471be8bd7---8320328671.pdfIn PDF document text
    • https://gloriouz.in/ckfinder/userfiles/files/23852123191.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16093f73d7d8d3---reziva.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/mnfvnilap3ai675pvbco39j77q/lewigiweronolem.pdfIn PDF document text
    • https://fishuntpesca.it/file/80002273085.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086588a23fc9---fefovesadaroxes.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/nowopo.pdfIn PDF document text
    • https://steammining.com/userfiles/file/wozerazefurabaxugoxi.pdfIn PDF document text
    • http://dakmet.pl/upload/roniwudaragakakafar.pdfIn PDF document text
    • http://abpaluso.com/upload/file/zisixilepuxij.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967a944f637---73903923287.pdfIn PDF document text
    • https://decoveinvestment.com/userfiles/file/kebajewejolepe.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/73411025394.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/11808438352.pdfIn PDF document text
    • http://chnli.tw/CKEdit/upload/files/doxejumufeputafe.pdfIn PDF document text
    • http://mariopresto.pl/userfiles/file/towipusuxe.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/kukoxini.pdfIn PDF document text
    • http://maksimetall.ru/files/3160132954.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/budepujiwikizexujor.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/66317811805.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/96184854954.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_off0000cf24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 20336 bytes
SHA-256: 8a1a630ee1a54372bd62a319248800022d199cf2ef9dbbf535c2cc891df411a7
font_02_sfnt_off00011b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B02 10556 bytes
SHA-256: 39736286b0f26bc4819c8f3d643b6f4f54485036b5e9901f100a0eb6a0354e3d

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