Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ee27162a827db2…

MALICIOUS

PDF

71.7 KB Created: 2021-09-25 17:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 40cc37346b0e73af0fb05f8a8870f039 SHA-1: fee5698288f947cb2f66424eb4227fbcf17211e4 SHA-256: b0ee27162a827db2179d5fd70c3b6180ae1fb84f4987823f69cbba19c09f6b49
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites, as suggested by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, which indicates a link farm on disposable hosting designed to lure users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://garglob.ru/uplcv?utm_term=watch+online+telugu+movies+with+english+subtitles PDF link annotation
    • http://safeabortionnepal.com/userfiles/file/perunune.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/64330113765.pdfIn PDF document text
    • http://fmmvn.net/userfiles/files/kalexajejavexumasetenozej.pdfIn PDF document text
    • http://thietkewebbacninh.com/webroot/img/files/romufavo.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/vixetu.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/rexufajuvabitogudenax.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/68923002298.pdfIn PDF document text
    • https://aymsoft.us/aym_image/files/bizagosago.pdfIn PDF document text
    • http://abwrva.com/uploads/files/15734725842.pdfIn PDF document text
    • https://parkettworld.com/upload/files/kajibos.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef36ada7f3---31537640130.pdfIn PDF document text
    • http://auswallendorf.de/userfiles/file/37476751779.pdfIn PDF document text
    • http://gesht.ru/admin/ckfinder/userfiles/files/58387077043.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/nunigiwibutetexut.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/widebosa.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/95695461060.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/75691780444.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/fetokekuzefuxob.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/53351309183.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/junulizewefonurazip.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/88292656574.pdfIn PDF document text
    • http://dubilex.com/userfiles/files/98963106579.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/29933267231.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_off0000b3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D2 16904 bytes
SHA-256: 37185ce9cfa14f8cd1b2207dccfc2286fa0559aee0e0a894a57e5bce5e5c2861
font_01_sfnt_off0000df2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2D 10960 bytes
SHA-256: 00c659d1533f2cb31c42e86072df290c5f3c822a80e175d7eaaedcda2e002510
font_02_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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