Malicious PDF — malware analysis report

Static analysis result for SHA-256 e600663ae8fc4fc8…

MALICIOUS

PDF

90.6 KB Created: 2021-07-04 01:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: b0c8477dd87e275f17177e70bbbea99e SHA-1: 91652bcbc8cd50e2be782fe0f0035e4f562bb8fc SHA-256: e600663ae8fc4fc8ddcbc279cb708ff25ea7a1b89247aafd493dd78e81512b1f
104 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to compromised WordPress sites hosting further PDF files, suggesting a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the intent to trick users into downloading malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/79b8c1011486bc8b5282104477c0ec5a/78076273561.pdf In PDF document text
    • https://nistd.in/userfiles/file/94589084208.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609950447ac7b---disipumerigelikudup.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/cf48ee7d3f6eab3cfd23cea15751c9cc/gobafavesuvorudopi.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/54146260599.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2d40217476d7fdab36a16abaaeb7da24/pikenezanesemeronalije.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894ff242ecb---69762214391.pdfIn PDF document text
    • https://jordanadams.com/ckfinder/userfiles/files/57251174864.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16071b5d46913c---87671370723.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/27d681403be2a28d2c6be2596a137df7/77895984603.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9e7ad41d19---rofan.pdfIn PDF document text
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/wovomovujiveviwokej.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/75546367353.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa35eedf7d8---30633547686.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/b49c85e1270a55bc0f0d3d0e2adcaf4c/jaketewuzutefaligejuda.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a61acf6caf5---93587408568.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/41502402275.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc58fd2f4d---mupik.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c92a089bffb---76139556605.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160881b090c316---bixafisosereratejigalova.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/04cfc1e6464097f1ba56ae1decf4ef60/57963797886.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/lobirarowonobunixe.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/88384027961.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/kuxafu.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9672d9ce52---90104573990.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/jibisudekulefefa.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767fa3f306b---71724396816.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/sediw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=marfa+girl+2+movie+download+300mbPDF 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_off0000fe7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7B 11132 bytes
SHA-256: ec3b7db911e0768bd2ea603e25825a3ee22373dbaf046bded2a927535ddeee9a
font_01_sfnt_off0001184f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1184F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13061 16988 bytes
SHA-256: 67870c5f86c152146f382ba865906703816c50006209b21754dac678b3b4d68b