Malicious PDF — malware analysis report

Static analysis result for SHA-256 adacf0a30c33257a…

MALICIOUS

PDF

85.0 KB Created: 2021-09-02 05:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6505eb9c8fa906c09fbb68895d6480f6 SHA-1: 296ff67d86d18be6f6de72d7a5ca30771c241786 SHA-256: adacf0a30c33257ab5945639c9b69f9c8e45a45fe234805f503e09628f95bb30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous compromised websites, likely intended to host phishing content or malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=5th+june+star+sign PDF link annotation
    • https://doublehaircenter.com/upload/ckfinder/files/xarojivamaviwo.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/waletoduwukiloge.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/5f8gnusfbjo0qtqt2ch8te0vfk/vidonejozoduwebutatipe.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/18301070740.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/tononofozepowudisow.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4107b54e2---84687124976.pdfIn PDF document text
    • http://agro-partner.com/Image/files/mapevowezubomeponiw.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac90fd9859---43017182327.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/2c4ab0ed25b830647f72b26e6cbb883a/90379448568.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/e0069a46b26a5998fd59a7b1230123e1/vemimekusakujakupo.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/6239209861.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/favixuxil.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/sovez.pdfIn PDF document text
    • http://geometrabottero.it/userfiles/files/7467123588.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/97298224482.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/fisiloramimusapovizu.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/1e1bc1e06672a33105184bc462c2d470/40672521295.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ccfc7f3f6813ec570f0fe60c5aac0baf/kivogabitow.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/43061496862.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/26472714599.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/29260423529.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/72258865310.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/pofawegoko.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/428a75da8bae343d65906e5d766c5634/ruvawozexawevijut.pdfIn PDF document text
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/vobebagafebizomuliregew.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608508a3e1306---81003598899.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_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 18132 bytes
SHA-256: e00c48017976fdb08b3309838af75cb2334b7f6450d83d7860ec734ae2c44aaa
font_01_sfnt_off0001161e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E35 10488 bytes
SHA-256: b0e502a7e8e3280097352b0c84a7f89658b5250937abfce7b11431f101a9c4f8

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