Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af0be6d46d51f46…

MALICIOUS

PDF

73.4 KB Created: 2021-09-28 15:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 01674e36f2b3d6e3ea7b42b381904957 SHA-1: 4e8652f1a1ca08a3b86b92865edd4da9bc7eae8f SHA-256: 2af0be6d46d51f467845986b3f21a7d9118e6dd47de717b3981a001a6cc56c48
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded JavaScript likely redirects the user to a link farm, as suggested by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, which is designed to obscure the ultimate destination and potentially host further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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
  • 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.
  • 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.
  • 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://agnieszkapawlik.com/userfiles/file/10749822548.pdf In PDF document text
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/zepikuvipemotixisovefiji.pdfIn PDF document text
    • http://dejede.com/userfiles/file/gutitokowidisufasusubabu.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/nidedodexexubaz.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/12481886386137dff44b2b2.pdfIn PDF document text
    • https://atlantidegattico.it/file/sujoginokusunutabi.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/57507849457.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/zimexukijuporemi.pdfIn PDF document text
    • https://sanipro.ma/app/webroot/uploaderfiles/25915613901.pdfIn PDF document text
    • http://customize.fr/fckeditor/editor/filemanager/connectors/php/img/Editor/file/22148560327.pdfIn PDF document text
    • https://xn--nmqu14inmf.com/upload/files/34877366468.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/nukejemuloben.pdfIn PDF document text
    • http://www.ujepites.hu/userfiles/files/164596023.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/390471400.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/85ce4723d1f1d0b666c7fcb944ed7f75/vubivedo.pdfIn PDF document text
    • https://suacuacuontoanphat.com/upload/files/91632413366.pdfIn PDF document text
    • http://ty-int.com/files/files/nuvetatij.pdfIn PDF document text
    • https://bibonatura.hu/ckfinder/userfiles/files/kazefobupabamefow.pdfIn PDF document text
    • http://clinicaveterinariailmarzocco.it/userfiles/files/80504730541.pdfIn PDF document text
    • https://vetamblj.si/ckfinder/userfiles/files/nutebiralelesesaw.pdfIn PDF document text
    • http://xn--2e0b30g3uq7pay7m.com/upload/fckeditor/file/punutunepesugonim.pdfIn PDF document text
    • http://betheaskssd.com/flash/betheaskssd.com/file/zexuvatusima.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/18161030499.pdfIn PDF document text
    • https://mimpiindah168.com/contents/files/25371135776.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/31298528610.pdfIn PDF document text
    • https://mygoaltv.com/ipp/images/uploads/files/rabazipevepavita.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/vazexozajasuvojuvitog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+block+a+range+of+phone+numbers+on+androidPDF 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_off0000b69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB69F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ceb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB6 11476 bytes
SHA-256: c3a5c2289a3b15a520288a1406cfadea4eb77d6dbd93fb68cd01c63991a83891
font_02_sfnt_off0000e952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE952 18024 bytes
SHA-256: 9eb4fc946c4fecb3d0ce37c52507401fd728ce2c139f33a6e8f5bdcf4af4de13