Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4d39d4f09e62d8…

MALICIOUS

PDF

104.8 KB Created: 2021-07-01 21:12:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5ca56f3d4738460b93fdd2fbdc3dee27 SHA-1: 82035e30d1e0826eafc3efc1f6f317465bc44334 SHA-256: 9f4d39d4f09e62d8f20c0be2c16d0ac2c72aba49058309bb8c896d25084222cf
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609728d9d7270---33440221046.pdf In PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/875138911.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/vodijuvek.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608db70401f14---votepikipafilewixoduvevu.pdfIn PDF document text
    • http://com123.vn/uploads/file/54397754059.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/refuwibifikij.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/65379149049.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/padozewev.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/qen53mvqnhbqjmaeh8m0g3gl1b/15368487214.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f748b1ecf9---dujenefexekutulenaj.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160982c3d5a7ae---mekilexomuduwazase.pdfIn PDF document text
    • https://samsunyapi.com/userfiles/files/norejitugonawuxibave.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766f5f36802---28193469274.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a3ecf2eb4---wubesoxipiwajorolobero.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739856db5d8---tawoworugame.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9166c6b9---21195576431.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/mowekisabajedozavuza.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/cd8337632218d87feeffcbfa3e5f233a/43010912441.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/63b81a4594f2cac7f7b0148c503dc297/91590006962.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/6412722019.pdfIn PDF document text
    • http://ledson.ru/upload_picture/45142137433.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/3034102317.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84fd3195c---tawiketukiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+does+second+thoughts+meanPDF 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
stream_003_off00012aa8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12AA8 18484 bytes
SHA-256: 03b8e0677bba87904d4dbd54a893df59805d6b96960b629949ceb547aa17a8de
font_00_sfnt_off00011297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11297 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001487e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1487E 20900 bytes
SHA-256: b5099495038bac932c88d5a9f933fa6de01ac210d0f5530c452b94ce13bb0cdb
font_03_sfnt_off00017d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D42 10672 bytes
SHA-256: 17766cb5d008955ea9e274371f44e181e47aa96dac506bf586c89cd949641349

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