Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3d903f3bdfdd62…

MALICIOUS

PDF

75.3 KB Created: 2021-09-09 05:00:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a0b5b402304d43d708122003a0b80ecb SHA-1: 15db9b426866f4e575aec0229d3b2e6170e60dec SHA-256: 0f3d903f3bdfdd621fc502393b8e592811e8dd116821422b7bbfea4fc6209298
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://marcobernini.it/userfiles/files/xiselebojajazupe.pdf In PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/mamisasoz.pdfIn PDF document text
    • https://termokingbt.com/ckfinder/userfiles/files/nagud.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/95131331201.pdfIn PDF document text
    • http://iscyber.com/userfiles/files/korid.pdfIn PDF document text
    • http://ecole.ru/text/images/file/21400297531.pdfIn PDF document text
    • https://24emk.ru/ckfinder/userfiles/files/dogaxezolewokufalemefux.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/jatapobolavemukufe.pdfIn PDF document text
    • http://tyros-club.de/userfiles/file/22629974903.pdfIn PDF document text
    • http://finalstage.biz/js/upload/files/dimilusepegosaxuwusos.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/5382407637.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/43969644532.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/74973086183.pdfIn PDF document text
    • http://tprcindia.com/ckeditor/ckfinder/userfiles/files/98507826905.pdfIn PDF document text
    • http://bouwbedrijfansing.nl/userfiles/file/12465134586.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/buzidusixi.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/23764656644.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e8c050641---zodetoxugatujirad.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/90409828788.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/58138421853.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/pukunowepubabiguwizon.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161313b4a9b4b8---savenududidurimufamorak.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/64245286006.pdfIn PDF document text
    • http://ap116.ru/userfiles/file/87774020637.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=8+ball+cash+hackPDF 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_off0000c46c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC46C 17340 bytes
SHA-256: 0b5ba53ed0a1c4128378e36d30080ee021901af7d55c662e748e95681a78a785
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10960 10024 bytes
SHA-256: 8066a6e09332c4c25f282823d073937db198df0fe00631cacb5436cf2915a770

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