Malicious PDF — malware analysis report

Static analysis result for SHA-256 e99ebd766350a758…

MALICIOUS

PDF

87.6 KB Created: 2021-07-03 03:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1a71e0038d879aa605b546fd99478a69 SHA-1: 34eb6b059c48b58a7695bff3a1b26b6231684997 SHA-256: e99ebd766350a7582b790ff5c79f19404635bb0840f35fdf144cd5d5eed48d0b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites. The ML classifier strongly indicates maliciousness, and the presence of multiple links to disposable hosting and compromised CMS upload directories suggests an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 5

  • 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 http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b169f94007---64012935348.pdf In PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/ql19h3c1ac326h2hcmjlrjott7/37378884866.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/5645a24a2c15f2effdf1fece4e8d4ea7/89459601255.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/d0lgtjco64gaqpufbj74naa37k/81403287193.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a676c01b3---83033249643.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/95837829833.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/xozasezolemux.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/9a974e2a277007dbaf32db6a9108fe89/34336064330.pdfIn PDF document text
    • https://trimix.bg/UserFiles/File/bevemozelibozejajiwuwo.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f079940fbd---pabid.pdfIn PDF document text
    • https://silverlabpupsforsale.com/userfiles/files/84042484771.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/wabivuwibapuburik.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/705ebb973cdd57a9fe1c1e74520b0df7/52180439316.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/47c03def16297a8cece2ea1bb90aabd3/19707275698.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939742c338e---xuruxafanu.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/mibakoboledavi.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/3hool8l23r9bib3mpr5ng17114/25219281967.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/rmlthtg8sbpq7n4n1jjcd2uvto/59146091014.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/3224cadbe5a76a50388519e95fe84547/98911983280.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5670db13c7---93943334253.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/b2dc13c2fc7a6dead86c943a10090835/7086691935.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/80g9vuk7dv5p043j2d905reae7/pevutisudinav.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/41520051150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=practice+masters+for+geometry+houghton+mifflin+answersPDF 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_off0000d59c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 19260 bytes
SHA-256: 9b7222ef13d6aedfc85f30fc21b48249b7fbb4aecbd65de8de61b9e5593a4059
font_02_sfnt_off0001210d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210D 16116 bytes
SHA-256: 74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084
font_03_sfnt_off00013666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13666 11084 bytes
SHA-256: 4382581fddca5bcae850a37e264303b6e4bd32f80194734cc42b673443e47baf

Open this report in the interactive analyzer, or submit your own file for analysis.