Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd7c436bdd052b8f…

MALICIOUS

PDF

83.7 KB Created: 2021-06-28 00:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7836f7344fa2d6a08422282aa7aca198 SHA-1: c941cda01ab0e132ac033172dd2ddfc41eb252be SHA-256: dd7c436bdd052b8f3e6f5cbd6074a65e4c20d3f4e30092afe62ad4dcf97ded15
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links are likely intended to redirect users to malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bc644743f---rinekepalukiraju.pdf In PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb145d6c6d---68112917815.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3be16189b---redodiporefa.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/davefamipuzezatul.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160799b18dea43---55376595949.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/fd7c4c998ba822d1726e4ff0ef8a8090/53945519083.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/puvori.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/gigujitar.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/ruf3jo06n8jk9png40sh34o124/30021142165.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160708ba0db708---97483410147.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/87cb2bbc3086fb08e8d90a41bf6d5836/99792238588.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/01859b97297b71629b79a38958d5eb22/52998981392.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/gifariluvu.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/8mp43q20eoi2kgcch04dbhqjdq/forezobanusezodamok.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/da89ab28826730913487647903b80204/pizedazapovupamilufefove.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/40044851771.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/tibol.pdfIn PDF document text
    • http://www.victoriousintl.com/new/resource/files/ruranejukixu.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2490cd43da---43738426936.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae37dcb8eac---85853980536.pdfIn PDF document text
    • http://111-orte.de/testarea/cwsCMSlight/media/files/rovomopikese.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098831078d21---siluf.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/99282259919.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=huh+meaning+in+textPDF 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_off0000e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D9 17580 bytes
SHA-256: d671780d9bd8e5f74308af924f90cccdd98bcecb4e0093de46d15e6e6663c0eb
font_01_sfnt_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 10312 bytes
SHA-256: e2bcc70dc8bea246db1bd0a6c29014a46007efd97aeb2e3c4e082ba231f25aee
font_02_sfnt_off000129f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1