Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab2d607458343f1…

MALICIOUS

PDF

60.9 KB Created: 2021-06-18 17:53:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cb8bf296a2780c8e02addab40540b7cf SHA-1: a0ada84165fcad521170af78dc754814bdbe46e5 SHA-256: fab2d607458343f18562c06c762ded1ad138784500bbb82e718f55cb9cad12e1
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7655

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
  • 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://narcisse.sk/editor_uploads/files/85326162310.pdf In PDF document text
    • http://hutergroup.de/userfiles/file/piduba.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081631222350---mezajutawasom.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/54iacqapcf9t90luf0jopgmo4p/wiwita.pdfIn PDF document text
    • http://novichiha.ru/pic/file/31893333217.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/wuluvotidazuzozugiduzaf.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/6o8bd23lq7ej8n5avndd3vvu2u/firipetexuderusuzagikize.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/95902355462.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/q05mj346akfq2fjegjq5a8l93q/mibidalaremokubezapibo.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/96183929745.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad102d33560---nikiwogowi.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8019982c6e---42057998364.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160851955a360c---vuxolo.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c5780700684---18749216849.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/85309915340.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/f78866f7c5431be46b7ee7fd576d23cd/pifigomovokibabodas.pdfIn PDF document text
    • http://cichanski.com/Upload/file/rirujomivoboxawonukufowo.pdfIn PDF document text
    • https://tramtron.vn/uploads/files/files/pamudorejewomibigumuwolo.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc7258e328---lodebevekemomuzegenila.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/kofure.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lego+harry+potter+ps4+trophiesPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE515 4860 bytes
SHA-256: 491fe413bbb25177eb6e6cf7f37c4fb0a3df002be63f041e67763f8e735966a1

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