Malicious PDF — malware analysis report

Static analysis result for SHA-256 73547988e1e0e28a…

MALICIOUS

PDF

109.8 KB Created: 2021-06-27 17:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: f5a3e4a8960745f0199a5626c98110ae SHA-1: 40c5ec8815228a8ef704dc5034dcd8ea21543875 SHA-256: 73547988e1e0e28ad5e3d203baded0e54d512f93bcf68b5602334233772d901e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9330

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://drafthe.ru/uplcv?utm_term=rekindled+love+meaning PDF link annotation
    • http://ehoron21.mn/uploads/files/vifemawifegumusorujot.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608150740641a---40661689458.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16078f74b8ced2---42614835475.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4bd49eff9---rololuvoxopugovazeruroduv.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/10411836939.pdfIn PDF document text
    • https://fallsplat.se/file/71647054897.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bd202789fbb---pakolebeme.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/remazowajitefufowuta.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e215fadfa3---59405449540.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160941327af87e---limagobagedowijumazugeron.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/5a3b910384843d1a7932e18f74dc7591/maxogeliwutawugiwimobon.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/16581991686.pdfIn PDF document text
    • http://allasclub.com/campannas/file/xuzufunad.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///24230792624.pdfIn PDF document text
    • https://topupdana.com/contents//files/vewugalenejo.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/35400071395.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a89a2702f27---fozuxeguvokowas.pdfIn PDF document text
    • http://ambulatorioveterinariorigolon.eu/userfiles/files/1536729564.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/450eeb6b3b6bed66d2bbe1bda1dce8b5/30525666188.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/b628afc563ce8540c0b52839e75aec50/27569199961.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/jomakaxuzo.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/gilabiworozeger.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbb8daf8bf---56342245517.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160ad00b16f04c---66026697503.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/71cb7076e06549a1060549c6776889eb/42832744090.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/1c1ae2f9ac34d3e01f81496e60708975/ragofamerabez.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013740.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13740 18328 bytes
SHA-256: d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60
font_00_sfnt_off0001126e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126E 10428 bytes
SHA-256: a02d3e889912bad4ea62631f2583bb430d78c8863c06700d0d5cc31c4c045850
font_01_sfnt_off000129c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C6 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_03_sfnt_off000154dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154DD 23544 bytes
SHA-256: 5574e6f1cbbd008ea622c4415901c120705aa3a29971b1595deb552e1c4d8371
font_04_sfnt_off00018f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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