Malicious PDF — malware analysis report

Static analysis result for SHA-256 1459fbcf1ea605d4…

MALICIOUS

PDF

82.2 KB Created: 2021-06-27 19:38:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: e6fd241a00495e96908f9a79e1624d87 SHA-1: f8734b7d4956621d0463df8f005c500e3507a9a6 SHA-256: 1459fbcf1ea605d4318c0e9195ca3f980450a5dddde82edd21ff37913acecd0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://coretry.ru/uplcv?utm_term=the+silver+eyes+graphic+novel+read+online+free PDF link annotation
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084000af16f0---rasetidixamazotosip.pdfIn PDF document text
    • http://gorillatheory.com/admin/upload/file/57938881036.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/newavajaxevixavev.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2f8995e4c---50363875631.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/38723815755.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/ritib.pdfIn PDF document text
    • http://baohanhranghm.com/upload/img/files/25723646028.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/piviwebajasum.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/wumumekupuwokopa.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8829b7c6fc---81215833976.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b6042ab1da---watikuvadibip.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/b1fc1539fb8247716a568ad512d51eca/64052055342.pdfIn PDF document text
    • https://iword.de/userfiles/file/viroze.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/9634755917.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b58a2d8f5---62650422603.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/0a33bbf34bb8314881afe886d01e80f9/80479274283.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/c817e10832209956a126bbdd82176d59/vujidifuzasu.pdfIn PDF document text
    • http://thanuyentea.com/ckfinder/userfiles/files/39742118767.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/50bfed39b990a367d3c1a0ec843f2a46/zumofivasozux.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ad82b922b---59879004626.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/24500048910.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/vivupozisokudi.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/zejexufipedo.pdfIn PDF document text
    • http://medlab.webd.pl/upload/file/vuretevasaza.pdfIn PDF document text
    • 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_off0000de28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE28 10944 bytes
SHA-256: debb49952991f44f665557322af5272b01f0bf91de1229974675839292712c69
font_01_sfnt_off0000f747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF747 16956 bytes
SHA-256: 261502299a2f014089e88a7cb2273d621bb9a6c7566973d3df7dd5c7045d6472
font_02_sfnt_off0001234c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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