Malicious PDF — malware analysis report

Static analysis result for SHA-256 3202472f42004e05…

MALICIOUS

PDF

118.6 KB Created: 2021-09-04 18:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 13053c7536e7c1263a49b3d37f843b3d SHA-1: e4aeb890f755588b605afde1be4bb9cbcf53e61d SHA-256: 3202472f42004e053b63c1c7954869b73227dda38a752e3f55e69e9c8daf9cb7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicative of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are consistent with a spearphishing attachment used to lure victims into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://accuratesearch.com/userfiles/file/wuvujat.pdf In PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/sibulewafovo.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/kikatinabaxo.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/de796b058a728d60f8c06195645fc8cc/dedenefufomobaxubodux.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb858539f6---wamejibej.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/nojupuzunafatom.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/kofebimadewinojokiv.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/39619b844d194c2041409bc1c9c093da/7764117160.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/kosanevapu.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/8453d873985d1d7fd70b968aad424466/xojugedudobemofitoxenaxi.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/38352208898.pdfIn PDF document text
    • http://labotinnghia.com/img/files/55838350336.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c3006c3a227---96753723714.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/8a1d22430ea80ffa92c261f3cb5ef740/vigujepi.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160aaadf82cec6---72793929370.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/94507191717.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/tobinorovek.pdfIn PDF document text
    • http://clinton.abwingsmd.com/uploads/files/599411537.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160707bf411c6f---noruretikiwowesiwixaduga.pdfIn PDF document text
    • https://gencshoworganizasyon.com/upload/ckfinder/files/mesasorexibuv.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/jivexupasawuxedanilum.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2af701dec---40239623263.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/760d865a92920a5fb08d8d1f3cd16680/54229199047.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021060713224770554.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/wanunojelesajeduwod.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/52553191212.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=liberal+international+order+pdfPDF 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_off00016c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C3F 19056 bytes
SHA-256: b58f6df92e8e3ab1b4253bbf9db1a9afa93ab87c8c0d0a37afa25f8ebeca858c
font_01_sfnt_off00019d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D1F 10420 bytes
SHA-256: 8355e05aa6e0c9c0cbcf368c567d2ca26b201b21fc3f3e67d437c205351c3fdc
font_02_sfnt_off0001b48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B48E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1