Malicious PDF — malware analysis report

Static analysis result for SHA-256 0301eb88474db0eb…

MALICIOUS

PDF

184.6 KB Created: 2021-06-27 10:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 2dbd2225842db6b17d4b54489756124c SHA-1: 6b1e111a3e31cdf4d19f3c28d0d849f7e2fce8de SHA-256: 0301eb88474db0eb5b69d064b3bbde124e4455d8d6b0ef748208f38e7afca3b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and embedded URLs are indicative of a phishing lure designed to lead users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9655

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 http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f7f05c0d8---berojami.pdf In PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/e97e8656c544e51d25bca29a543e711c/99074369466.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/8562302631.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/92914758141.pdfIn PDF document text
    • http://heyibnb.com/CKEdit/upload/files/kevelemubapajolilajilu.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/leweza.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/38286ae0c785379f5ad8a7974bb21f98/movopugajaval.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/216e4569556945e37f7eb72d7272808b/makupazubaliwapop.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/fizeletomapusorufa.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c454f439fc1---fiwowowoli.pdfIn PDF document text
    • http://www.knickmeier.net/images/pageimg/file/71861209320.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb9e6dd8e---matagugiv.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92f4343cf1---jederepiwujawotol.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/64060690897.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/1a4b52c2423d2e7d5747edca19e07ad4/60845691780.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/zuxetuwuduw.pdfIn PDF document text
    • http://aklond.com/UploadFilesfile///2021043008591042.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f85dea6bfa---4635663366.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/gakup.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/1ec08ab13e1b13bc2f602b09163f630a/9839885865.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/gnhhl5d1d3rqt33ldptm90rdmu/jodoguwobirudajefomila.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c01d81557a---38613624268.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855da5d26a6---guxopuwobomila.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/73588692765.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae3bd5fbc5---95058240741.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=find+unit+vector+parallel+to+the+resultant+of+the+vectorsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002521e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2521E 21828 bytes
SHA-256: 456936f41afce58aa75face7a5e01caf4d523ec8c828fb48b885fd10dcd42226
font_01_sfnt_off00028ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28CEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002a502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A502 10860 bytes
SHA-256: 159759fd2305eb01b0396974308903867ee6d35f93e37ca29909aab1a888da3b
font_03_sfnt_off0002bdfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BDFE 16168 bytes
SHA-256: 1cfb00680a8a18ef5d5af493cc5b57cfe410abeba37087ee2ecd799c98b61e68