Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7302388d79163bc…

MALICIOUS

PDF

68.2 KB Created: 2021-09-21 07:07:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d15db6e4cafe63f279df0913322fc027 SHA-1: 7d209b14547b91a98e75cec42cbef9e3534e3a97 SHA-256: b7302388d79163bc6b5c553c3d464bc58f331faedd7e034dff236964d541461d
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to external sites, suggesting it acts as a lure to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating a pattern of using disposable hosting for link farms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sogelec-eng.com/files/ckfinder/files/diniwa.pdf In PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161480bf5e6161---vikuxakalufaza.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/fexujudusatelasuxu.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/4908154353.pdfIn PDF document text
    • http://kccmaul.com/files/files/27268512910.pdfIn PDF document text
    • http://teakdeck.pl/files/file/40220422872.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/lonoporuxodizokepixu.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/zagonodiximab.pdfIn PDF document text
    • http://garankuccu.com/upload/fckimagesfile/9528a616950a2da06a75ae321b99eaec.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/73167902897.pdfIn PDF document text
    • http://ceomit.com/fckupload/file/wuzoramewaraf.pdfIn PDF document text
    • http://dj-venci.com/uploads/pages/files/duvofawokijete.pdfIn PDF document text
    • http://kibbkw.com/uploads/files/8280192975.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/87409107248.pdfIn PDF document text
    • https://vitanov.rs/files/81341126636.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/50420386290.pdfIn PDF document text
    • http://www.farmaciavictoriayjmleon.com/userfiles/files/6950566477.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/deritutivoworexek.pdfIn PDF document text
    • http://bastola.org/userfiles/file/5653597124.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/20480501613.pdfIn PDF document text
    • https://hfbee.tw/upload/ckfinder_temp/files/20210905053050.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=serious+sam+download+for+androidPDF 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_off0000aefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC715 10680 bytes
SHA-256: 8b0c0a6b0996de1565ce49ff5c883441d6f6e8b477e9b45481f53402693c2c16
font_02_sfnt_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 14232 bytes
SHA-256: 9e8477a6a23bcd48295b8e86385c5c369da1493168cafa89ad94d715eabc6ac5

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