Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2485609106c26d9…

MALICIOUS

PDF

68.9 KB Created: 2021-09-26 10:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9ab96dd7abce3191c59a29239b61167c SHA-1: e863ba7c6cab5589c42ee05bad3f92ffe90dd8aa SHA-256: b2485609106c26d98a73b50e054a6c01f32b73299bbf78b46a996ce1f781074d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript which is a common technique for delivering malicious content or redirecting users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded JavaScript action and the numerous external URIs point towards an attempt to lure the user to a compromised or malicious host.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 https://coretry.ru/uplcv?utm_term=paul+vs+askren+stream PDF link annotation
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161332d243640d---woxutubifolosa.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/22884750234.pdfIn PDF document text
    • https://valeaflorilor.ro/img/uploads/file/dudatagawenidomew.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/jinarelisokepipeguwo.pdfIn PDF document text
    • http://deforma.it/userfiles/files/51916230127.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/22645788410.pdfIn PDF document text
    • http://savytrading.com/userfiles/file/mibidi.pdfIn PDF document text
    • http://kimura-shihoshoshi.com/userfiles/file/kebozisusapifazataw.pdfIn PDF document text
    • http://premo.at/userfiles/file/voxugojor.pdfIn PDF document text
    • http://teplospectr.ru/images/files/35305594994.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/vatikularapekogewifoduzad.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/36968876963.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/17244801022.pdfIn PDF document text
    • http://net-marketing.hu/images/files/32946984456.pdfIn PDF document text
    • https://colegiumaniucarei.ro/ckfinder/userfiles/files/30010023149.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/44378052822.pdfIn PDF document text
    • http://angelescare.com/userfiles/file/bolefopusuvu.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/59512159576.pdfIn PDF document text
    • http://thegioimaychaybo.com/app/webroot/uploads/files/49848442478.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/80290639507.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/pibufudusoxame.pdfIn PDF document text
    • http://cascad-trans.ru/files/23972379332.pdfIn PDF document text
    • http://bnblspecialities.com/userfiles/files/43131775225.pdfIn PDF document text
    • https://regionalhealthprogramsww.com/images/file/45309823515.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/6352c4b5c5037a60430b8347e33900ce/52470086836.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_off0000b015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB015 10316 bytes
SHA-256: d6ab70f06722d486740014a6ba62f03bef0f539773a5205c1d91d2faf551033b
font_01_sfnt_off0000c76c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC76C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 15464 bytes
SHA-256: 03b90f8374d3ae2dab98bdec2ef3d52d84674b6bb0a82bfc58d5a8972912bf75