Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e88a7c20e1e8bc0…

MALICIOUS

PDF

80.4 KB Created: 2021-09-09 13:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e2ba922a735a78528504d230486ffd9b SHA-1: 0361478009451416ca326061efafb7a7b259be71 SHA-256: 0e88a7c20e1e8bc0e0d4d54c5a24c6cf92713e8822a9457c4716438780da336f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://crewmak.ru/uplcv?utm_term=rang+punjab+online+watch PDF link annotation
    • http://ttccid.com/userfiles/files/fonutoma.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/2022323339.pdfIn PDF document text
    • http://kite-surf.sk/files/sigube.pdfIn PDF document text
    • https://ph2020.org/FCKeditor/file/vasixaxilupuni.pdfIn PDF document text
    • http://onishi-kyosendo.jp/archive/duviwadiw.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/0jvvpb5dpq8sbr5ecm7t71l1a3/xovatidipo.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/71841070111.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613770b6de492---pefugometal.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/30352042198.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/52444031432.pdfIn PDF document text
    • http://majedalkarkhi.com/pics/file/tiwatozav.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/tebodoliboxepavurate.pdfIn PDF document text
    • http://cobmedia.hu/include/vugedojekef.pdfIn PDF document text
    • http://lionsmarsala.it/userfiles/files/70343379877.pdfIn PDF document text
    • https://stomatoloska-ordinacija-rijeka.com/files/banumetufed.pdfIn PDF document text
    • https://paperland.bg/uploads/file/raxejabuximuka.pdfIn PDF document text
    • https://segurodegranizo.ar/noticias/fckeditor/file/jaxotumebojozol.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/wobexupidalunagujubazopej.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/13176844418.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/jikepuzetarosevu.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109071109084694.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f0bc61229---94310629881.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_off0000d547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD547 10888 bytes
SHA-256: d9eef6efae47392cf5c1e10bfd91e49ca583fc97dd002d6eca67661907339df3
font_01_sfnt_off0000ee2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2E 17844 bytes
SHA-256: 0c55bfc303ed7d7043a8a9638f610f0dea9d6926f0d4fb75731161fea3ca54b7
font_02_sfnt_off00011c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1