Malicious PDF — malware analysis report

Static analysis result for SHA-256 749ce1d812bf81c1…

MALICIOUS

PDF

69.3 KB Created: 2021-09-01 04:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eb77980aa66501ef6f926078563779e3 SHA-1: c053ba1dfb072fd53d3a5e1ca3ec944c7cbee310 SHA-256: 749ce1d812bf81c1fff10aa194e1bc09e9816e692993e1ad8b9fb69a35327cc0
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farms further supports this, likely serving as a lure to download malicious content or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9072

Heuristics 5

  • 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.
  • 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://huntic.ru/uplcv?utm_term=how+to+make+digital+signature+visible+in+pdf PDF link annotation
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608616feb1043---sunezu.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92990e27c---pewafenar.pdfIn PDF document text
    • https://mavibusiness.it/file/56698467300.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d814d1c13cd---73060392265.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d1b73ba7d---deluk.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/39089870759.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce262cdb6fc---90680900198.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/37999704557.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/70331215963.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210619145217.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/161200797a762f---zeretojitapuka.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/rubej.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/70473767392.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd33f057f21---86904534727.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/10788443422.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610c8764777fb---wuwidafe.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/13e328ed88941e57bca71d2678f39dc2/47041674679.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b23fd283b61---pawotosuripafojatavom.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/kazebilepegiko.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c629ce3e1---basufawuje.pdfIn PDF document text
    • http://gzmzwl.com/Uploadfiles/files/kutulukaxufagobidatebegin.pdfIn PDF document text
    • 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_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 17212 bytes
SHA-256: 0b2cd70595efa2e5c51706eeec8b3ea06e8e783b9af3919b8958832a03baa31d
font_01_sfnt_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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