Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25ad06cc6b7394d…

MALICIOUS

PDF

101.7 KB Created: 2021-06-29 19:50:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4ee3bf6693b4a27fe9b094cd117aa02d SHA-1: 9af78de931aefd1b0369553a6c8ca64445665f54 SHA-256: d25ad06cc6b7394d89a9ce15ecc0f918522623b85875da6759696c3db190937c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content or exploit kits. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9711

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://transbur.ru/admin/ckfinder/userfiles/files/20750636579.pdf In PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607575759d1f6---50255736581.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/66bb5b32e1b52fe954d45bce1c006b2a/kuwumowomoperefeneb.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160d802b89f03f---5453118831.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/62158d8b35632140e5dc180e33d16a7d/70434331466.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/42737481524.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/d1b3e9d7ce6ae941e4353646f56f9cd1/62225989252.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/67245920810.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/2c01491b2d5c33ba9e848702f647b02d/zajew.pdfIn PDF document text
    • http://cpghollywood.com/userfiles/files/ripage.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/lolidomeg.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/vupulipimuxavinin.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/nuxup.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/74650253047.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/95613663384.pdfIn PDF document text
    • http://logo4you.dk/userfiles/file/21414833603.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608606781ab8c---mewirubujalunoxewiraded.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/nlql2dj3unqq5vmfdve2roq6k1/zaxexuv.pdfIn PDF document text
    • http://petraifevronii.ru/ckfinder/userfiles/files/63473474643.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/mobijodasawefimoxuf.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/660dccd4ec0974bff88da536c1fa923a/sibeseguk.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c783db23e06---3144752224.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b7553c2879f---9086994358.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/64049d2ad5bbac791dc392e3dbe89cf4/55855320057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=where+do+i+stand+meaningPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012eca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12ECA 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001094f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094F 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_02_sfnt_off000116cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CF 10640 bytes
SHA-256: f6433b8e39ac92b886af2e0b038414a64eac52546ed56b15d7629268fe6b3a2b
font_04_sfnt_off00014c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C67 23968 bytes
SHA-256: 7a9475ea7180c67f4fe56c77b7bde96cf86047b3f1f93949cecf4b372195baf6

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