Malicious PDF — malware analysis report

Static analysis result for SHA-256 25204586ab907602…

MALICIOUS

PDF

119.3 KB Created: 2021-06-26 11:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: c109e0338e38c37c43c8fe51309806ca SHA-1: a9da6e819323bdd6b732486cbf69f867437d083c SHA-256: 25204586ab907602b0055c0b073337d9bbd758022359fd60d02c7764bd3fc57f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://inwebjor.ru/uplcv?utm_term=i+wonder+poem+class+2+questions+and+answers PDF link annotation
    • https://vate-tire.ru/wp-content/plugins/super-forms/uploads/php/files/7b7e2d95e9ac283797ca13db76c8d0cd/dibawedatidu.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0e070481e---xeviwuxekaxen.pdfIn PDF document text
    • http://gardatrans.com/content/Files/lipodetugexexonaxu.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/06f861e512ad01bda9ae883fdd671af0/4790349147.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/259d07ab6aca6629a67a786dc6808afe/mutowuvilusitibil.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a583eb57ea9---36600021273.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088fc70ca623---30088368726.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/pafakodejoruzodi.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/87028614912.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/k7l2dv5t7fh86qqctmg215rg5n/kofomosudaviraforivowifa.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/11404350015.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/dfd643a23092403cc4f117324f209131/dowomovusog.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/hai9sv4j2p33djre5q3u49d1a7/56411195615.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/h435o4hng85rdpptd1rvkc28el/tetuserixitotifuniga.pdfIn PDF document text
    • http://wych123.com/upload/files/12614362480.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/68466708657.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac94faeecad---38297049801.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/batetipinozamosokesonod.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/9sadepebmhrqo6t583u2fc5kmq/76145423781.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bde9674f40---57738191473.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096525e0f11b---30717628140.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_off00016e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E40 17572 bytes
SHA-256: eacf83359e4e3777188b7eec9f107a74fd0fcfc45e46ce30476dd2b09ba03777
font_01_sfnt_off00019be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B3FF 11080 bytes
SHA-256: ed25007cc355e01b428053780ecb83af3848760e10522a9c4c95a376d8b2b045

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