Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe82ab6901c0ea5…

MALICIOUS

PDF

93.2 KB Created: 2021-09-03 05:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fa35c425b4a19723c49f2864061c597e SHA-1: 23ca73181c518d01c8e1ef5cdde4d9c332fbae32 SHA-256: 6fe82ab6901c0ea53f7749f2b981c89ec6daa6f809806c863544a35540daf269
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which are associated with compromised CMS uploads or appear to be disposable hosting. The ML classifier strongly indicates maliciousness. While no scripts were directly extracted, the structure and URL patterns suggest the document is designed to trick users into downloading further malicious content, likely through a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://ozhelalikram.de/resimler/files/98050887151.pdf In PDF document text
    • http://kede.org/userfiles/file/nazisobagiposiwokeviwow.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/0e254687e3c7fa209178540802f54b09/vixunesodefudu.pdfIn PDF document text
    • http://zbirozskepodzamci.cz/userfiles/zagewofigu.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2a9223d72---55574918142.pdfIn PDF document text
    • http://k1a.ru/images/files/file/tivuwezujed.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/49715151970.pdfIn PDF document text
    • http://mazdooradda.com/userfiles/file/34446602237.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/gbd65ah8ogdhoq100bjtk0gbh6/jolasiguxusuribipew.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/161255aa5ce2aa---98486328572.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/56cd7b988e9900303a7fc4534ba97c5c/tudutalofunudomezitife.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7a6b22ebc---pikifili.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/64821524049.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/gufijojiri.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c882af7509c---siwositupazipuju.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a637b797f25---31183192599.pdfIn PDF document text
    • http://fittbike.hu/files/file/muzuj.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/7a9d88999c12aef152e9315633838903/muniv.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/m8f7v16t5k3sobv25cko492bnu/wiviwuxobarabimosotag.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaaf969073---miseripometetumamu.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/34248361240.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/kasopamufupozawuxegojojup.pdfIn PDF document text
    • https://behagi.eus/files/galeria/files/xipabane.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=best+software+to+convert+pdf+to+word+or+excelPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B50 10828 bytes
SHA-256: 86660cbe49544e0005adeacb8fa1f10a9c7a10806d8326dc5049a7633946b29c
font_02_sfnt_off00013497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13497 19424 bytes
SHA-256: b31297f1edd4e440cd8bac61ed11412e090633343663eeee686f265b92591012

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