Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e76f31c806ee69…

MALICIOUS

PDF

96.8 KB Created: 2021-07-31 18:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 278c8879c5265857412bdb4e9be813a2 SHA-1: bdac0a87f96a7b5b93cd25a801a438f338b67cd9 SHA-256: 92e76f31c806ee694f8f107dd963a405638fc6ca376506b231de8a5992d286c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded links and the PDF structure itself suggests it's intended to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/uplcv?utm_term=adjectif+et+pronom+possessif+exercices+pdf PDF link annotation
    • http://machinegroup.ru/img/outer/files/48753203741.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/81771327738.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/rutudejekokivovijadunin.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/50789100060.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/49598646455.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876d25ef73b---tuwogaboravos.pdfIn PDF document text
    • http://piau-po21inn.com/CKEdit/upload/files/46438720878.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/34574619537.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e68dd3656---52347732980.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/806c228f96eb1d602246fb56d2da30e7/11388622033.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/94071774444.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091a5f5a3a78---23095670691.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/46843154343.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16219251308807.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/musepibij.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/jawomojisigukipubev.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/boxutusofebulen.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/tawokuwol.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f3b29a377---82908460598.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/42804abf465d35a51b09ddfc132a2dd9/rimilejedofiwatem.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89dc2eba4d---69889248799.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160749712c52d5---rokiwenepujodi.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_off00010de8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000125fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125FA 21032 bytes
SHA-256: 8249b6e7a586a6dba6d1314457baaa66dfd822bbf8dd717dee10ac8efe51b798
font_02_sfnt_off00015bc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC0 10784 bytes
SHA-256: 2fe8d7c15847ef536df49cb457da8528b28997eeea4d2326c4f760f6b55bc0c3