Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcda647d0d79e9cf…

MALICIOUS

PDF

95.1 KB Created: 2021-10-17 13:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 146582c5c6379d5611cf5fbbc3e8a3d6 SHA-1: 1426d17a2fd62211492571d6f29bf95ec277ffa8 SHA-256: dcda647d0d79e9cf54740e3c972aca09a9a71729a8e9ba5a0ddcb9cd9a1d0179
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript 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 redirects the user to external URLs, such as the one found pointing to 'garglob.ru', which is characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 https://garglob.ru/uplcv?utm_term=what%27s+the+chances+of+getting+pregnant PDF link annotation
    • http://villalapinetafavignana.it/userfiles/files/35839248281.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/85ndm02o0hir0enn4hk4hmrhu9/dovebotafiseg.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/38249445541.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/0c3a1b7cb663b8ee56055cf7047fac45/lumuxivowoxiguzixet.pdfIn PDF document text
    • https://talenthunt.biz/userfiles/file/19998173501.pdfIn PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/99890078676.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/75747521357.pdfIn PDF document text
    • https://priscar.com/documents/files/pedeluviburoxe.pdfIn PDF document text
    • http://mycoapaisyl.com/webimages/files/67722762173.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/80696045542.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/211004132523769846iy2fee.pdfIn PDF document text
    • https://anup.bo/images/files/60939397322.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/29607216452.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/8482984705.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/2428639482.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/nibitivifanipinir.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/99341075361.pdfIn PDF document text
    • http://618tuan.com/uploadfile/file/54519182326.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/77716151081.pdfIn PDF document text
    • https://ajansnigde.com/resimler/files/kilogatid.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/50906370303.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_off00010d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D22 18660 bytes
SHA-256: e15340b7938a42d7c0588f17fb64079ee018d09b85967c34f1ed0ce0dffdfdf9
font_01_sfnt_off00013de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE2 10740 bytes
SHA-256: e16965a4cd01e692d004a7db662aca748434843bd7925a33bc3c26dc91b8956d
font_02_sfnt_off0001569e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1569E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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