Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff298ead9f1e0bc0…

MALICIOUS

PDF

86.9 KB Created: 2021-09-14 15:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 637d4c2a0bc169d8e03e58d1e3b8e8df SHA-1: 436c0e53d2e5f0a4dd5fe7825b08f27c218d46e3 SHA-256: ff298ead9f1e0bc0aa036f463ce48640ef057333555f895b9e85fafb776ad472
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'SE_URGENCY_LURE' suggests the document uses urgent language to prompt user interaction. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://modero.vn/upload/files/demovizirubiparesabaxe.pdf In PDF document text
    • https://linkevicius.com/upload/galery/file/lonaluzuxuwosubupe.pdfIn PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/76513634232.pdfIn PDF document text
    • http://sciattella.net/images/file/ruwulurekuxiza.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/wutatuzutozodepib.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/tirizopagefepesiluro.pdfIn PDF document text
    • http://spokoino.ru/i/upload/files/70906066492.pdfIn PDF document text
    • http://vhshf.de/File/bewilarew.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/fabodigediw.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/8c7c2faeb85bc93a78bf4258f70a029a/dojesiturale.pdfIn PDF document text
    • https://skvely-kup.cz/files/file/13178557071.pdfIn PDF document text
    • http://igs.compcierge-asia.com/ckfinder/userfiles/files/17450428595.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/pijil.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161373ee7a81ee---kataxemibaw.pdfIn PDF document text
    • http://ajeah-intl.org/fck_image/file/vaxamoronumirotuzevi.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/99862846701.pdfIn PDF document text
    • https://granitnet.hu/editor_up/ravunerolajisesakisev.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/59335838129.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/xuxalisegodebin.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/67969913227.pdfIn PDF document text
    • http://www.cpnatacao.pt/backoffice/ckfinder/userfiles/files/74656938179.pdfIn PDF document text
    • http://eunlocker.com/Images/Editor/file/todudixixereletezowavebap.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/wemibezovererufem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mirror+iphone+to+android+tvPDF 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_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 23016 bytes
SHA-256: 835e47a4a33be203c318e9acc499bd1e2d39649140421ea62be21a4de45fd741
font_01_sfnt_off00011eba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EBA 10336 bytes
SHA-256: d21a6461c903c76b6809e55602bf994b25e380b4fa7df4c109e691f2e09ca849
font_02_sfnt_off000135f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1