Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cda8f43985c66b…

MALICIOUS

PDF

97.1 KB Created: 2021-08-08 20:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: de0bb32213455ea65d9fe89331eb7894 SHA-1: 746a87a100de33a43dab641684b3f538c2e51630 SHA-256: d5cda8f43985c66b2b8dd08b859855dfe29eb1c246e08d77c6aeffa3cd9f9833
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://propellerclubsandiego.org/uploads/files/vomosedikuwaluka.pdf In PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/e217d085a3ecb34353e461cd3cf3ce7c/60472768119.pdfIn PDF document text
    • https://lymfologi.se/anvandarbilder/221/files/90402987746.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffc27b0a4b---welejejubefogexe.pdfIn PDF document text
    • https://on-call-anatomist.org/ckfinder/userfiles/files/86479510286.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16089013a9632c---31503180233.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/ximizegixid.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/lopov.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/79076d210b7fb0fe9ed2e0d8072c8b62/52773466653.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/02c51ffc8643606820c2a0f7c63958a7/kejomokozatasona.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/586adf13d503a8bfa59deb364bcd1f8e/13793580403.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/4999680443.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/64fb74b0bbf3ed12b7ec8c70963435dc/17146606596.pdfIn PDF document text
    • http://bio86.fr/fichiers/disufojumudexon.pdfIn PDF document text
    • https://hoavily.com/uploads/files/61059680311.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/84903664608.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/50083614341.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/31747283642.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/62188748659.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/9ea4d25f0a8c577980f132412916b879/89579558480.pdfIn PDF document text
    • http://www.supair-lux.hu/ckfinder/userfiles/files/44577002506.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/78b582526653e82b484e86f0939f87a3/49577682846.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=d%26d+5e+book+of+vile+darkness+pdfPDF 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_off0000f9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D7 38232 bytes
SHA-256: 66d4fbb9aac960aa5062db0d65301073231e6ab992afe6f946b776177e8524b6
font_02_sfnt_off00016278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16278 9076 bytes
SHA-256: f695977626623e59fedb2fbedebd468d0acf89ff6f6ceafeb3cee4351ddee6c8

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