Malicious PDF — malware analysis report

Static analysis result for SHA-256 6adbefbebb07944f…

MALICIOUS

PDF

177.5 KB Created: 2021-05-09 23:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: fb747ee54d71240408294366481ea6a1 SHA-1: 090418b000e8666cf613d17f54c9bf91a23ec62a SHA-256: 6adbefbebb07944f2a2d38c719f7a46ac4aa69eb1e19598f4a6335d1b6a2dce7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content or redirect users to phishing sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/15062f5fa569f5f9792815bee82bd076/vixevufebagiwezo.pdf In PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/f03b2528125ee509805f5f2df4958c81/kujalizazafogegu.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/b014374f81d8ab879c8755ccf95619b1/84391636868.pdfIn PDF document text
    • http://fullcolorspandoeken.nl/userfiles/file/pixezedovibomalupuleroxu.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb1ea663c8---kafebojuzuge.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d027d83552---97865848958.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0896ee1dfc39c21de7ec4e53b54f53dc/filikapuxo.pdfIn PDF document text
    • http://abc-tel.ru/data/File/senopubebibukojenenojumo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071ebf13c094---tudaxaluwamivurolasufiwo.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b8482d716fb3ab0a64916c3cb0e43f0/tegisuwufekesiviminasi.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160960a7e577eb---74270498582.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/c7a09987980ce016a40b05dacbc7ff77/metisulinovifofav.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/f36c30d149c7564224a3d93108647096/64411088160.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4f7a01351---xixibofilumepiwafezuzotu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160977b79c57a9---88650999074.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/7f6865299c27a069656e5020d084352e/gapawapemanadimimiru.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084b9a29e1bb---30286611826.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=blackpool+formation+dance+festival+2019+resultsPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27429 5956 bytes
SHA-256: 0fd5998f87de1dae8e31cabdbd77cca596f12ff5ada4dbca59266afaa198de54
font_01_sfnt_off0002886d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2886D 14980 bytes
SHA-256: de776bd82093bf1bff77bee5ef1c313e27d41859c00b245b1faa2c6904d53cf0

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