Malicious PDF — malware analysis report

Static analysis result for SHA-256 14248ed6ca11eee2…

MALICIOUS

PDF

110.6 KB Created: 2021-06-30 09:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 81b6910a4d4f6e392e49b126ce5176c7 SHA-1: dce27996a1cf6f27d611808e53c0604d7af91990 SHA-256: 14248ed6ca11eee2c56ac6f71f32f78be300a6b71b9df8c7910c3ec63a58b1a0
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9698

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.
  • 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 https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/bec2f39f1c372c5b295d773b08e49f86/78593542436.pdf In PDF document text
    • http://kpotplace.com/uploads/files/waforenowejilalawimel.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/14370972380.pdfIn PDF document text
    • http://patronusalapitvany.hu/public_html/upload/88757049897.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/7495020317.pdfIn PDF document text
    • https://banghenails.com/upload/file/xusogupupi.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/12f62bab490c44e133d936e9d6a86aac/22594420496.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/qaskh9sgt1b8at6boia801sl7u/38094633478.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/rumabulafadelifoxobegos.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/26987320746.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a9e677bfaef4b223ec54afaf96da8db1/tiwipobodonitepukomitozom.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/49353915041.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021061308094870554.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9194d6ebc---49957610832.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/63c8814e3dadfeb04fc27e6f44612386/fimaxobiwifexujaz.pdfIn PDF document text
    • https://nhakhoaanphuoc.vn/uploads/files/17535944658.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/kp4ult2qf6u822jnaskhe2t9p9/vuxiwav.pdfIn PDF document text
    • https://bio-obst-und-gemuese.de/userfiles/file/66978471921.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-7/20210507060030857175.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/jodededufukusajawe.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160cde291a56b7---tovip.pdfIn PDF document text
    • http://esistore.be/userfiles/file/pisuzolerenadulupokulusux.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2be1e127df---navodigoriwakuxiduv.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/0beqdo0i4r1ksq6d5h1bl9h1rp/zobadobogejole.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=barring+any+unforeseenPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00015989.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15989 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off00010a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0A 22448 bytes
SHA-256: 9c07c42f81743bc6d471b8150533545199120f114918694d22d6dc4b813a2c31
font_01_sfnt_off00014177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14177 10512 bytes
SHA-256: b3c21517242abbfa163f93db30e6e01afe66d0aa5cab37d7216c5ab3b2dee36f
font_03_sfnt_off00017721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17721 8244 bytes
SHA-256: cbf014e4cdd1c15b36d37a42b2f154bf1a7308336ebd46e30dbdf855e2837633
font_04_sfnt_off000192d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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