Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99a181f8049a059…

MALICIOUS

PDF

77.0 KB Created: 2021-08-27 23:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: b6373fc8e7e62788209f13518dd43f0f SHA-1: c3bf729aa6e631ba5b19cc7effa4c492b65b5ff2 SHA-256: f99a181f8049a059cc1c9f305d8ecc199f7ef58e5e3e393fab70053c3ccb9702
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://originalcheck.it/public/img_admin/file///6557203712.pdf In PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24706952022.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/19652500326.pdfIn PDF document text
    • http://win-sonic.com/kida2018/ck_imgs/files/18857621534.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/rebevuvonaporisadotifi.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/nugaji.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2588c6231a---gegag.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/cflfrfhipi5bknkvbbpvm7ncc5/tamopatefilol.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/buloxitekam.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16107272449004---pikadexuw.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/xitafufup.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/92718638518.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16093a91a7e3a2---60112552440.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/10788542657.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e884409e---senivesavineniveja.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607480b29f426---tipejerapi.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1609b47164d44e---76004749772.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/22144866108.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077272b46d5a---folukukokexemudelife.pdfIn PDF document text
    • https://maisonforville.be/documents/file/85129925618.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/99663522810.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202105211428498496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=daniel+chapter+2+questions+and+answersPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/2644d23e5138b2968a9fdd961cf4dcf4/65463006885.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_off0000c7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F3 11064 bytes
SHA-256: 3da4051a44411eba59896cbcf234fae47d82138551dfbeed1b902cafc49ff20a
font_01_sfnt_off0000e192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A4 16900 bytes
SHA-256: f831f2c0bcd234956081cbccb2eaec9bbb2aa506e6dc19b33f7c7ed5c91664fa