Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2b7f9ab8806e11…

MALICIOUS

PDF

144.6 KB Created: 2021-06-28 12:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d50296decd20c3d4f318814626c9ea2e SHA-1: 9c5fda3c7ab1912d1e98bd0e8dbb5a6125eafaea SHA-256: 2c2b7f9ab8806e11bf2b30c16a516fa6c9bd3426baa3b1fc8fb4551d0f54f796
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many pointing to WordPress upload directories on various domains, indicating a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support the link farm and potential SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8826

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.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4e64b496d---84827139761.pdf In PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b1fdae274---19675198787.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/138021543.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0689d021b---nuzugozifikajozaruzakumik.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd2dd10325---28839886726.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d51daae38---nuwexonuxunorekubupanu.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/fghe6mpi576h0aq2m8t8kf8185/nurajolumafiruzigox.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/ff1e24dd9a2bc04124d71cbea9a004ff/felakaguso.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/maxemokegumadevubopirozik.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/23885994032.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fda8b6fca9---64078182800.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/wasudutab.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/54446114f115be3b673f7c4cd7b6993e/joriwe.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0bf1f39f8---sivojofati.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/7919496461.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/b892adabc292e5612767197b75151b30/bezuz.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/4a18e09f1e3954c62ebf36795711f899/69227777067.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/93980342001.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/6071e901275fd16551b8cb98ba88943b/lolepomuxotodis.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a96839491---raregurupabik.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/40193190141.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/1936779451cb3cedadff367039a1f046/fiwijosis.pdfIn PDF document text
    • https://33mobility.net/uploads/files/kufaguzetibugidadulugibog.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/e39bcb2ad8d1fc9b13374b00a62ebea7/80536371454.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/44329411900.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0b568e6f0---32011547360.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=meow+wolf+spoilersPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B694 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001cea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEA1 1992 bytes
SHA-256: 609f9e85c1105ff5218e9c993c5f2abbb958b0e23fb201a237dd60b1f979541e
font_02_sfnt_off0001d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7BB 17708 bytes
SHA-256: 9030467308e2e99959aab70c9359787df2ac7ae33c09ad4b71f721be82f95ca6
font_03_sfnt_off000205b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205B8 10068 bytes
SHA-256: c680b4b2446e82a8791a09dc021b49837a05b8070c438fa9758ee104c3af1e01
font_04_sfnt_off00021c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C4B 16252 bytes
SHA-256: d66bf48e304c78f6080084e0c9704384de85738853ce87f784528b0e0784b990

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