Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f789dc5f39adb6…

MALICIOUS

PDF

94.1 KB Created: 2021-09-05 18:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 825f69b139e8c3c450b1e3621ad2ad2f SHA-1: 0d628e71ee67005e4b8274104f75e33f50b4f7cc SHA-256: 65f789dc5f39adb65c4a729a21a33b0a98159b30598ea6578ce0eca1748c28d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b30f3541f95---newebexizajoru.pdf In PDF document text
    • http://olympiad-bigben.ru/ckfinder/userfiles/files/rifebofosewerojureno.pdfIn PDF document text
    • http://didaconcept.com/admin/fckeditor/file/39231160224.pdfIn PDF document text
    • http://www.fd.ntou.edu.tw/ckfinder/userfiles/files/vufaponitibenoni.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b6e5617527---13912459840.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/detosebotefizite.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/letodamefil.pdfIn PDF document text
    • http://khautrangkhangviet.com/upload/img/files/mumikenasepawovujoju.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/eegussathf6bfjvpr8shhj348i/kokikikuromidisetodimuvej.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16072d7b70a179---22623693763.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/jijubevigijegonolifap.pdfIn PDF document text
    • https://wildnaturetravel.com/File/kipakugadupogiz.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202108310832154609.pdfIn PDF document text
    • https://rumputhijau.com/contents//files/sumokijixebimekaxu.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/59887108626.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/a1e5ec4c36e39530112882fbd2f5bd8a/mebubimegumukokujode.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/bujaxobufazax.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/74135728862.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/tovutudepifanatezemolafiv.pdfIn PDF document text
    • http://girisimcilikproje.com/resimler/files/bavodizizexesade.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/jipusenub.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/29574832610.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082a12215fcb---22740210563.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce20e6abaa---11162643437.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/jewamisuvibaxofotatanov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=%D8%B4%D8%B1%D8%AD+%D9%86%D8%B5%D8%A7%D8%A6%D8%AD+%D8%A7%D9%84%D8%B9%D8%A8%D8%A7%D8%AF+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013732.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13732 27604 bytes
SHA-256: 03e1e1a62a203237f48bc1d91e29a3f96311e13de60bc53e324a3c95b3c3fa0a
font_00_sfnt_off0000d445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD445 19952 bytes
SHA-256: 8943c4c16baf2a5b4db60830c0d42b7b67f3000f72c51d9441050168321aa390
font_01_sfnt_off000106ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AC 9372 bytes
SHA-256: ab692011bb810b4091e5b6863c1468cc19624005727076e0e42723678ec61724
font_02_sfnt_off00011a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8F 18164 bytes
SHA-256: c6d3a46881f17a56ce1c16b2ef309b878f55ede0457e975c309cce9e3fecc5c9

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