Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ca5f62fd726c6c…

MALICIOUS

PDF

72.1 KB Created: 2021-09-08 07:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b1fb223200012a3bb0efe48e991f793f SHA-1: 01b51735dc31c9a640cb9dd808420264eac1f18e SHA-256: a4ca5f62fd726c6c94bac29459022a1f84f3ca8758f3f94f836bc25257d7fe75
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting it is used to redirect users to phishing or malware download sites. The embedded JavaScript likely facilitates the redirection or payload delivery, aligning with Ingress Tool Transfer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6717

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=beamer+latex+pdf PDF link annotation
    • https://ajitcoatings.com/uploads/47226032252.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d90c0a96c26---82189177006.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ce411e70b---fafirutatuvo.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/56466444054.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/30182291302.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/50244494471.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/57232898893.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/bcc23852eb82bf4e4da46226086d3a17/wapupumopel.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/29630048833.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/74242670570.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/27753602309.pdfIn PDF document text
    • https://vokalensemble-vocembalo.ch/userfiles/file/73983575578.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/ab7f7d0fa06e0a133098ac7722c5247e/14701263311.pdfIn PDF document text
    • https://chatsystem.site/js/ckfinder/userfiles/files/giwaroberile.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/4219e06f4149c11d52f192b0e76bcdef/94718986259.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/dipazabutuzel.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/33951286062.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/xumavevorowanele.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/4463741313.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/75451541957.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/161253db4e0662---zixeler.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/dogipunexiwabujokubevav.pdfIn PDF document text
    • http://aiaato.com/FileData/ckfinder/files/20210708_B8EDFB7226BECEA9.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1611ceefbbb28f---bafotemigimuxamukomarisij.pdfIn PDF document text
    • 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_off0000fcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 10328 bytes
SHA-256: 56fd4caf562449a986393b74a9e517adb58aed1ba84beede5b0088b303adc4ac

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