Malicious PDF — malware analysis report

Static analysis result for SHA-256 808922f32194a59b…

MALICIOUS

PDF

71.7 KB Created: 2021-10-03 02:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e4811ab21688c99fee244f21d08e4048 SHA-1: 5e4aaf80c4e6f698f1afd9b968baff77a038defc SHA-256: 808922f32194a59b5c7fc24f9412f34f4fad9e7de927b19520e5d38d3bc416a5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://wastran.ru/uplcv?utm_term=how+many+ounces+in+a+dry+pint+of+tomatoes PDF link annotation
    • https://thefencedocumentary.ca/adminfiles/file/50248908923.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/kuwilowegobiwon.pdfIn PDF document text
    • http://intertribo.sk/files/49242691075.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/13578778187.pdfIn PDF document text
    • http://ahknchem.com/upload/files/28788178356.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/wosororiwidazox.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/8bqodkl8dbt0ks5p0dif1s23l6/50078012498.pdfIn PDF document text
    • http://tc-muehlacker.de/data/tcmuehlacker/userfiles/file/piwilopusovurozego.pdfIn PDF document text
    • https://5udua.com/contents/files/32193047060.pdfIn PDF document text
    • https://webhosting4.net/media/file/buputiditu.pdfIn PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/dinakolajanita.pdfIn PDF document text
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/68981124780.pdfIn PDF document text
    • https://themalc.org/files/file/38971770450.pdfIn PDF document text
    • http://chhattisgarhsanskritboard.in/sharpinstitute/images/files/78251853558.pdfIn PDF document text
    • http://gamax-motor.cz/data/dokumenty/takibadurazonozerejije.pdfIn PDF document text
    • http://safarekhoob.ir/basefile/safarekhoobir/files/23985003704.pdfIn PDF document text
    • http://cartopack.be/Images/file/22065100948.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/83521851581.pdfIn PDF document text
    • https://bongkartuantakur.com/contents/files/jirimikotub.pdfIn PDF document text
    • http://ajk-opakowania.eu/upload/fck/file/bemajikepuzokexosov.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16151d06fc68ef---70424409221.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/82919859611.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab063b20f7---88331954363.pdfIn PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/xodokixo.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_off0000b49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAC 16764 bytes
SHA-256: 8d14f73b6ed3ec84099c5aa93265bf070737b4676ca00f60a2a961fa9fc790ac
font_02_sfnt_off0000f729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF729 11024 bytes
SHA-256: 9488253cbb8e22089bf119a0dff267dbeee1a68006f1665c578b51f2a1cf5dec