Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e7eaebc05544af…

MALICIOUS

PDF

96.0 KB Created: 2021-09-15 11:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1d5407cc085d855300e0309ba18c3af0 SHA-1: 33af5f9394552ee6b2b0b470371e23b8dd0dabe7 SHA-256: 01e7eaebc05544af1c70ce392f3ec19a79e82f4f55ec5b57070de701497d4cdb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on potentially compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware via the linked URLs. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=h%C6%B0%E1%BB%9Bng+d%E1%BA%ABn+copy+danh+b%E1%BA%A1+t%E1%BB%AB+iphone+sang+android PDF link annotation
    • https://a2designbg.com/userfiles/file/41308356464.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/woxurova.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/5695169122.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/megerifukedapafepazobo.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/lugipufujosokabufen.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/ravituboz.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/61290129106.pdfIn PDF document text
    • http://tythb.cn/uploadfile/files/31991313101.pdfIn PDF document text
    • http://teenmag.cz/userfiles/file/87429948926.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/563b1cda47f988754da9cc3a4f2c6461/nakafon.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161418d7a5eb91---11512121360.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/19731014626.pdfIn PDF document text
    • http://tovicetour.com/FileData/ckfinder/files/20210903_9AD70AE9CF8D8795.pdfIn PDF document text
    • http://hacoauto.vn/upload/files/39966085887.pdfIn PDF document text
    • https://rheinfurth.de/userfiles/file/bixewuzer.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/xutominawuxetil.pdfIn PDF document text
    • http://lachina.cn/upload/file/54737831570.pdfIn PDF document text
    • https://twinslock.com/ckfinder/userfiles/files/fonozivejigex.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/jifewemu.pdfIn PDF document text
    • http://tangneylaw.com/admin/images/file/rogosibakuno.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/33326673505.pdfIn PDF document text
    • http://www.ez4parcel.net/upfile/files/2021/09/06/zokodanijabefibalujop.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/vezut.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/rvi5hgh58lgeqr4m8ets95depv/zinoduniwatumesubinebu.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/8296166571.pdfIn PDF document text
    • http://live-net.it/file/gavedija.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/litavemutivu.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/kukirugowosupazawozeteli.pdfIn PDF document text
    • 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_off0000eb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 12088 bytes
SHA-256: 298bc316e721558aa6562a569e3274f9e9c0e049a1f5f02c66d103a03a48117a
font_01_sfnt_off00010686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 22780 bytes
SHA-256: f9c570dba2c2c440c7d1c44326bc7436f5471f419581d593fb37d404afc680ac
font_02_sfnt_off00014168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14168 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00015979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15979 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4

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