Malicious PDF — malware analysis report

Static analysis result for SHA-256 f04e5b291e88e4da…

MALICIOUS

PDF

95.2 KB Created: 2021-09-09 17:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e0517bcefedcb4318b29e33832175550 SHA-1: 21b0f7b1b69b84833a4f2016f143d1988f51e91a SHA-256: f04e5b291e88e4da208b30531af00d900962d3d6bc9778c0045ec2bb7db3114e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/uplcv?utm_term=bubble+shooter+similar+games PDF link annotation
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fofigawoxukifaz.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/dumamibi.pdfIn PDF document text
    • http://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/97686110581.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/49186282866.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/gaxigatefagifale.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/84874088211.pdfIn PDF document text
    • http://cserepakciok.hu/xdata/file/25225768246.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/1851063169.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/jasupuginanotejelekewezi.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/movevare.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/6139c651d3d61.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/70842419663.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/wilasiladomesozejigav.pdfIn PDF document text
    • https://mbbs.hr/files/83194656360.pdfIn PDF document text
    • http://dkkarsin.pl/img/upload/files/sinego.pdfIn PDF document text
    • https://dusunceokulu.net/resimler/files/26806464825.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613158d55f4b6---fovufa.pdfIn PDF document text
    • https://bfull.ru/uploads/files/lokifud.pdfIn PDF document text
    • http://studioboscono.it/userfiles/files/liduzenipubozinowuvul.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/gutesokopivesigubeben.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/livumexumatox.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/rupogoz.pdfIn PDF document text
    • http://polletnv.be/uploads/files/83911615450.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_off000111cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CF 17132 bytes
SHA-256: e46873ec8faf38a47518e1ce1f035624dc3fafdeb76699925a7c807baf1d3af3
font_01_sfnt_off00013e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E47 10744 bytes
SHA-256: f3c30cf07b434eca940b318e0205f1218a3036e6d7f6f97f9f22bb2dcd444873
font_02_sfnt_off00015707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15707 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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