Malicious PDF — malware analysis report

Static analysis result for SHA-256 9572905de4e74c66…

MALICIOUS

PDF

70.2 KB Created: 2021-07-23 03:01:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a54291db7fc4653a937cf2b807211eb5 SHA-1: 2b34798e1e143532df78d2273133f31951daf408 SHA-256: 9572905de4e74c663670eb5ebb858561d6c9b71c55408c1bfccb83b5f0cbf2a4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the nature of the links and the PDF structure strongly indicate an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8982

Heuristics 5

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac4d807c94---68606835825.pdf In PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/03687a7179cff58dab530e51f09fd49e/76131414567.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608beed773147---79223415607.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e55d93647---pamuxokalufapidinido.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/65658703633.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/92983319210.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/gusidogisug.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/vipevapobawopeporikurewog.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/fq3g3n83rp124mdnavvfack7hm/gamebotadasuxe.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da19c1104a6---xesawasobowusonavojetet.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5b30c3e9f---dokegig.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608309dba4540---85803613038.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8b60813e1b28139549251ee78b781142/75709244102.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f8e898487---fetepato.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/24058677506.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607e13472c48c---fogazopenafuzalinezi.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/e4eqmeqi7jn60q7fdmh1mefqtl/tuwatofom.pdfIn PDF document text
    • https://turbooto.vn/upload/files/rukemolovusuwirejodasitem.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fc9828575---52420035793.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b58d98dc79---24081068953.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/kawesolelorunegizomaxawi.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160733f620e32e---20367501922.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/df221f022883170bf9d6391cfa604209/10591994396.pdfIn PDF document text
    • http://vilocom.net/webroot/img/files/14765507401.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/5cc361e3a2a92ba13da6d7219cd09553/42291919787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=firefox+save+page+as+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF575 10568 bytes
SHA-256: 3d05a9be18fbd8b305c7d25e3c1f70feae83460963de5c6a3f13b3a9d8a05924

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