Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f32ec4c7e2015d9…

MALICIOUS

PDF

116.8 KB Created: 2021-07-22 16:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bf26afe959a5c6ce14f326d9d2132839 SHA-1: d49c5a43e66585a0d00efe246d46a0d72bad945d SHA-256: 1f32ec4c7e2015d9ef78938c4fae533943fdf8654b8774e2c14b90e573709f89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and does not provide clear instructions, but the presence of multiple compromised links is a significant indicator of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7446

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 https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7a3fe5469c.pdf In PDF document text
    • http://aptatravel.com/clients/4/48/489dad2d2d8436d4c085fc0ccdc2d1b3/File/pawerewipenew.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/5qvn6hj1vnlkvsk1elq13c1qo7/85490308636.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f0e0a3a09585244db07ea31f2905bfc0/29777805098.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/89837316693.pdfIn PDF document text
    • https://irantruck.ir/data/file/18842610545.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/58299086196.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/menusabapifuliwawigidedew.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e58f5288f41---41527333499.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b3de7536dd9---xitekuredutoviwuxux.pdfIn PDF document text
    • http://visusmarble.com/images_upload/files/vufonuxekomibu.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/251632t60bqvt1aliob3n95f45/zunufavaruwe.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/maratidifiradigenatusel.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16099fe06de291---wabunusadamolimubisudav.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/tkha47ij1fa2plge94c1snjeaf/44323490731.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160c945cd15835---firurotapexa.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/37345841069.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed72fd1166---tesisibotawalenuwipu.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/dubajikurufobulivo.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/srrc7bsg49n70m6ure95g2kq1q/delono.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=where+in+the+bible+does+it+talk+about+abortionPDF 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_off0001b5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B5D9 10668 bytes
SHA-256: fb990736e1a9498393e250de76a323d63358117c7c4bed5b54ce963a94477561

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