Malicious PDF — malware analysis report

Static analysis result for SHA-256 2025deaf920bc8d5…

MALICIOUS

PDF

75.4 KB Created: 2021-09-07 06:32:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9f8dd26ef3ed7f2ab7523e58bff742ee SHA-1: 3066e07547e8d53122f331d7340b048a766fa77d SHA-256: 2025deaf920bc8d50100fb65bd0c12d73d2c090506af59b81f2c807c47f98477
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, 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 0.9976

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 http://kukubara.com/zdjecia/file/60305364195.pdf In PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c36a38a971a---posegekebodakogiw.pdfIn PDF document text
    • http://siciny.eu/userfiles/file/tobegatorosevefo.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/87971876848.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/46877873699.pdfIn PDF document text
    • https://adikkedua.com/contents//files/6672310363.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f414795925---vawozimivilatopixevoj.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/58df7874cdb547997a2df84ac52f56ad/wosafabukujomuwuwibeb.pdfIn PDF document text
    • http://qiuyutv.com/userfiles/files/20210607020149.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160927bf07420b---kikaxenazijezasopidona.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/xikosojokezodib.pdfIn PDF document text
    • http://blatt-gruen.ch/files/wiruketapove.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/26bba2b62e9196760f35c77d69fc8c3a/kekakalopukedigozuwejezad.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6f2379b5d5ac80e522c5da46461af495/votusivedabaxav.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210714/file/16261977422334.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/98359094570.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aad2835c8e3---35441756046.pdfIn PDF document text
    • http://aptchasers.com/FCKeditor/userfiles/file/nunoremaniz.pdfIn PDF document text
    • https://aczv.fr/userfiles/file/nosezuvago.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/49161194352.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/rokegufoparexa.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/safogisete.pdfIn PDF document text
    • http://tradeweb.es/userfiles/file/25008961165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=bangladesh+army+circular+2019+pdf+downloadPDF 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_off0000bca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA0 11784 bytes
SHA-256: edc897878ad88e222417ac2a5c7ad27bc56afd78da12904290d38db91996f2bd
font_01_sfnt_off0000d887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD887 18220 bytes
SHA-256: c284e1fa4d4140d8876551f1112c8f84bd8016bb5231d9d80bfa12391459cb83
font_02_sfnt_off000107ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1