Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e537a29148a7d0…

MALICIOUS

PDF

69.6 KB Created: 2021-09-24 20:51:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 45d9355cdee865d85ad8828026539385 SHA-1: cce2854bd9d2023c3f5c1cdf85a0563b0c97cf3a SHA-256: e2e537a29148a7d0092ce430e932d9f9c7c663805b778304835be4d3634b7165
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with multiple URLs pointing to compromised WordPress upload storage and disposable hosting. These findings suggest the PDF is designed to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://allytemp.ru/uplcv?utm_term=mytv+bg+tv PDF link annotation
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145dc29b0662---35686094261.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/70fafa91eddf1b5287eb087995ea521e/papogiri.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/65635154550.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/wujevudozobevufini.pdfIn PDF document text
    • https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/lemefog.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210924_3AD6DB9E4F6BC047.pdfIn PDF document text
    • https://atputasbaze.lv/images/userfiles/files/batifemumeberefoveril.pdfIn PDF document text
    • https://aromamarketing.md/img/files/rulasoguwiwapemerosofim.pdfIn PDF document text
    • http://malerbetrieb-malanders.de/Webseite/pics/fotos/1/file/98662636975.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/81728223228.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/28261363828.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/75343072163.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613888802b09b---suxuxumebigisan.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe11aa2e47---webunorigak.pdfIn PDF document text
    • https://letstravelforacause.com/miet/assets/files/suxinumo.pdfIn PDF document text
    • http://superbarter.sk/media/file/tamugogexerazolaji.pdfIn PDF document text
    • https://strechybenesov.cz/content/medesexitupuzewibegagabe.pdfIn PDF document text
    • http://citadelcaralarms.com/userfiles/file/kasugut.pdfIn PDF document text
    • http://phukiendoxe.com/media/ftp/file/2717207992.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd4f752bbb---82322379373.pdfIn PDF document text
    • http://razzledazzleevents.in/userfiles/file/78973963141.pdfIn PDF document text
    • https://mayersoffice.com/userfiles/file/91486816874.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/mosugesarowoxeworipizoxox.pdfIn PDF document text
    • https://gloriamus.org/Uploads/userfiles/files/18273443986.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_off0000b0ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0AE 9672 bytes
SHA-256: 5dcab1852b2199ca92becdb29816066489bee13cac5dd8e423b48ef9eb5a05cc
font_01_sfnt_off0000c5cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5CB 16800 bytes
SHA-256: ffa307275c708222cde774e6b2efdc4a6ba35d0ea379329188177f808a853329
font_02_sfnt_off0000f10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1