Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea3741af61de1993…

MALICIOUS

PDF

68.4 KB Created: 2021-09-15 23:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 47e927001b7c51006375497e34da6d90 SHA-1: 5c93e868e68b75529ee15f5807e58b6f805fa75a SHA-256: ea3741af61de199335cd6ff736fd19388fc2e5db6202c20eb6dd31486307eea7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to suspicious domains and are structured as link farms, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6961

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://taiwanquinoafamily.com/shopadmin/upload/files/vupamajar.pdf In PDF document text
    • https://healthmatters.me/userfiles/file/3428565326.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/korovotexigupe.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/vimigobefigusetofekisefa.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210908170803.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/tifugiduji.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/zebizupi.pdfIn PDF document text
    • http://morakothotel.com/file_media/file_image/file/43629718390.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/meguwosifemak.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210901225436.pdfIn PDF document text
    • http://greenglobepms.com/uploads/84724742217.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/6106380975.pdfIn PDF document text
    • http://www.aunay-sous-auneau.fr/ckfinder/userfiles/files/joxonapavowelutaxi.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/dojuluzebufinumumeker.pdfIn PDF document text
    • https://hr-serdahel.hu/images/file/zinoveko.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/21958194238.pdfIn PDF document text
    • http://1-sanya.com/blog_images/blog_/file/bugabowapiva.pdfIn PDF document text
    • http://technimexvn.com/images/ckeditor/files/xogakezo.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/65860371179.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/lajaw.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/vopuvalixamanoteja.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/42698237397.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/wimusajosilijujibivaxor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=tutuapp+apk+ios+free+download+for+androidPDF 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_off0000dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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