Malicious PDF — malware analysis report

Static analysis result for SHA-256 77d6c0e00e5108d5…

MALICIOUS

PDF

82.6 KB Created: 2021-06-26 17:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 60c4efc5a4bd1f1a16abc84244959719 SHA-1: f080b38bbdb4514991739e7ef9ec917ce417a1df SHA-256: 77d6c0e00e5108d516a0941b77e0c6eb33db1b43b5aac137198cba2e9a1972cd
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, characteristic of a link farm used for phishing or malware distribution. The presence of multiple external URIs and a link farm structure strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://camping-du-lac-dijon.com/fichiers/40293512387.pdf In PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/vefepogivoru.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/gbn9q68hrtliebc612s13o3p48/60465688477.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d690f0532---1584522404.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609308a47d9f4---81543223006.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160895adfaa028---66019490129.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/bavixinupiwuputarenuno.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fae158a5a---sajelirupupav.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/k2uh4vno7mskm3g8dg7jsnqilv/22878569566.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d61835cd---977558070.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/jelakopik.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bdd868c83---31975503925.pdfIn PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/lufumozodejemesovowago.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/227bd1ae817543f07a9ede484d6af3e3/23303265826.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/zavonumoj.pdfIn PDF document text
    • http://russia-ex.com/tekulekemodulijaxawix.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c93965813---jopojaxerapejesil.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/kumexavijuj.pdfIn PDF document text
    • http://tlumacz-lipno.pl/pdrzewiecki/files/61189128067.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/jewefawebudelifadejoreber.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=ross+elementary+analysis+2nd+edition+solutions+pdfPDF 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_off0000de8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 11036 bytes
SHA-256: 4d275954d9ef0ec8628d9845a7a42035121058a55b81fda5df8df3fc5e37e55f
font_01_sfnt_off0000f848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF848 17184 bytes
SHA-256: 8066a1aad5fd5cca19c0f832752ecd77b62e8c855960519a7063a2e319a08ccd
font_02_sfnt_off00012542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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