Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d75ae848fa1264…

MALICIOUS

PDF

94.5 KB Created: 2021-07-03 22:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7d2660cc0103ed21ca04bf53a916bba9 SHA-1: 66cb2a86b2f63c2731bd3d44f356ab213dcc178e SHA-256: 54d75ae848fa126498141c35fcdf6afb5cc78c97ef873716b9bb460951dd55c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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://bomberosdenavarra.com/userfiles_nexo/files/bugitime.pdf In PDF document text
    • http://graphicyazd.com/ckfinder/userfiles/files/nelugimigutor.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607aebf12304b---tiwadetuv.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/7c63f61cf70dc1e3249437d50d149315/85494994546.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/5672c3caf8596023cba7c74d535fe7a9/gotigulibubomerajizesata.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/23386971997.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/7rfckmg152omi7ins3hhhrm967/20907447089.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160802bd2b50c6---wevejesepi.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecead0b639---naxebudagugenadem.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/ccidracoho7p522d6tmdko9rh7/zaseloraxozabejudoki.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/7497036378.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/574c9e3bfca900baf62642770b7d23b5/11474407500.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160983494bcadb---godivawosenamonaw.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/e4d1e212c8d78a3644fce64e516d0589/disedebefemi.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210505172613506625940.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/d8124d5410f3d1c0e937945cc6cf7b24/20308098137.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160acd6daab675---69524599903.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/95edec749e018da0b75b019fbdab2a8e/pidojaxodijosenemekefixo.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/basubavupusegadikolopakox.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/nunofim.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcf31660d3---bebexino.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/xuged.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfe2d763c0---59207079875.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e197abeca6---rofunilepawadibomupaperuz.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/47ba72476b4d9b5cfcfc0206bbbad433/93035343829.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/55435536155.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/jubiteliriduje.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=the+mummers+paradePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DD 17464 bytes
SHA-256: 8c8f9a0814e37d4884b575a973b1b5320438786ee243c18436b2961c116bfb0e
font_02_sfnt_off00013ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EDE 10260 bytes
SHA-256: ad1019d41b3ec7f6fe37ddf3569742c4930cf62f276baf6ba36169ebfbfd3bf4
font_03_sfnt_off000155de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155DE 16060 bytes
SHA-256: 7e09a3551a5f95464d485b0302bb2ea5a0fc1ccd586ad0b46555f182e6907fed