Malicious PDF — malware analysis report

Static analysis result for SHA-256 554588ef8a8b324a…

MALICIOUS

PDF

73.1 KB Created: 2021-09-21 00:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 87d43064f8a74f58494f25c357031411 SHA-1: 9c38f145f5e498c624c5902235a9d2ee2ac519d7 SHA-256: 554588ef8a8b324a01503d2cb682f680e5311d7362f80deb5f2533d5a6719d6e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious redirection tactics.

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 https://coretry.ru/uplcv?utm_term=how+to+hack+fallout+shelter+pc PDF link annotation
    • https://gruntbudowa.pl/files/file/71753756563.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16146663dab628---nujokodogodinisiduwapebe.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/lubobudutosetaniwatapolez.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/75385355421.pdfIn PDF document text
    • http://naoshima-tours.com/images/blog/file/43611303308.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/xepoganidevilabuwewit.pdfIn PDF document text
    • http://hevolta.com/upload/file/lejigesovofirumowifone.pdfIn PDF document text
    • http://detskaoptika.cz/ckfinder/userfiles/files/fupefugibizoke.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/4cfe3690b4cc5786e723af66e70004fa/vavibaludotafer.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/97201665955.pdfIn PDF document text
    • http://samtekelektrik.com/files/nifuxi.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/7v4ci01i02e3pgiruioddf4c22/pidebiralifesomovoked.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/98021358575.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/xumegevutuxovenokigajogo.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/gisokepukipuxi.pdfIn PDF document text
    • http://anpo.vn/upload/files/lapajirafaraven.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161312bae0a79f---41984709435.pdfIn PDF document text
    • http://wernitznigg.at/files/kugusewipexitavofa.pdfIn PDF document text
    • https://lifeteacher.tw/uploads/files/202109130207366694.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/arp90fhfbh0j9o8hijpvlg1fo1/51337786962.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/48704384029.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/50703021061.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/95194688107.pdfIn PDF document text
    • 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_off0000b9bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D3 10648 bytes
SHA-256: 920bef65af40f3853245d35f8db349f20cbda813c04ee921231d21768d5e07ca
font_02_sfnt_off0000ea78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA78 17048 bytes
SHA-256: 259f65aea6ed5c7b7b3aa3c1a2b16be3fe3e01295c4205c3fbd63a12f5eda8f7

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