Malicious PDF — malware analysis report

Static analysis result for SHA-256 70b76b587611c2af…

MALICIOUS

PDF

67.5 KB Created: 2021-09-11 08:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23363fc791d32be280019d9bf4f159d9 SHA-1: 4df27911724567ea13364fa65d229b93180fc506 SHA-256: 70b76b587611c2afa3ebecb80857e4e65e589ed287649ce5344a915cf80f1237
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 ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, such as the one found pointing to 'huntic.ru', which is characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://huntic.ru/uplcv?utm_term=cricket+live+download+app PDF link annotation
    • http://caudafotografia.com/userfiles/files/xilifuluxukuvisim.pdfIn PDF document text
    • http://eminenceinc.com/userfiles/file/77342124752.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/90073292910.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/kakuputisapixaregenepogum.pdfIn PDF document text
    • https://digireg.si/upload/zizinutesedotudab.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133dabb71edd---todulokonutigevomozulelag.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/55499209130.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/36893143594.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/bevinajinenufitalij.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/zinetevuzabipa.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/bfc3hvl0ksfaq6oka6inuh3jh6/ranujipetadixasab.pdfIn PDF document text
    • http://tao-oita.com/admin/upload_filesfile/33828556802.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/66395478424.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/41688036335.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/20652284883.pdfIn PDF document text
    • https://losaltos.com/wysiwygfiles/file/vefiwilugizefateno.pdfIn PDF document text
    • http://genarchi.com/data/temp/file/sojopipaxe.pdfIn PDF document text
    • http://ichieh.tw/uploads/files/202109051704354928.pdfIn PDF document text
    • https://korankertas.com/contents/files/pajeravojovute.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/35191015160.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/43275542883.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_off0000ab8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c3a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A5 10612 bytes
SHA-256: 03e3d562aea037d41b4a0dd759486f20373feb48e7bded8dfa31a46a1e6f6bca
font_02_sfnt_off0000dc16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC16 14664 bytes
SHA-256: 0d3f24feb1dbe375111eb58a2cd68dd553bf8975d8645723510fd4c33ba0584a

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