Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e1b3d06bfb99464…

MALICIOUS

PDF

80.4 KB Created: 2021-07-24 22:11:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 02d158794e648bd4ca2c8a8ab628db06 SHA-1: f4430efa351cb15620eddd32152d25b3e8c14970 SHA-256: 4e1b3d06bfb99464d3ae218c16f65d2f9b4574fb2e8c1ec781a34065cdbe8976
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains. These links appear to be part of a link farm designed to manipulate search engine results or redirect users to potentially malicious content. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6637

Heuristics 5

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cropscipublisher.com/files/upfiles/file/56129940454.pdf In PDF document text
    • https://soalmatematik.com/userfiles/file/88759760151.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f87d373f2a6---wakunipakobaxetoxad.pdfPDF link annotation
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0651c11d7e---dizawirak.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c7f27f435---73167761164.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/f01ed1633e4ca905f2d71b85f2e8fc85/74859813741.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/07/08/gapepov.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/tujiwubiboxizozajofetu.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e60938bab---39178583317.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fa1e9f941---nakilinafudapuduxoze.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098321ccc680---xekuzizarujixuvazoxobi.pdfIn PDF document text
    • http://lblussana.it/images/file/repigavos.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080e9ef96914---bazigezovisesiwekefip.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/tiketosewibenub.pdfIn PDF document text
    • https://ienter.bg/files/59599182199.pdfIn PDF document text
    • http://debden.org/userfiles/file/nagetek.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7c662f54e---zodizib.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/jawagikikojiwu.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dcf3637cbb.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44513521841.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/muwamerazomex.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/02130c19fdbc3c6fec6e48bad368404e/nugobimepujofi.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ai2dg97q8n29hqbfrk287u6dfr/62786181557.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/upb4q1dt7cd1srgpra5msis8da/73435388487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=one+touch+ultra+2+lancing+device+instructionsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001051f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1051F 10960 bytes
SHA-256: f39ecbdc03739305ec26e00d707fd2e71597c6b8a2b271828be1c2438ae0c701