Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e63b0d0dee4e3d…

MALICIOUS

PDF

68.2 KB Created: 2021-09-24 18:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: bee58610f93eaae95c2e860c5a3c3035 SHA-1: 28623b3d58636108eba3494163805c1a5f802ca3 SHA-256: e3e63b0d0dee4e3de9ffe0b816594853a1971c3d55515f0c22ecdeab77335600
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 5

  • 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.
  • 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=aroma+tv+pro+apk PDF link annotation
    • http://cesarrodarte.com/userfiles/file/72263607396.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161389dbd9bc3e---wirukarazovugugirufulor.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/gufefupapilebelixi.pdfIn PDF document text
    • http://upnbkk.com/file_media/file_image/file/lovefafob.pdfIn PDF document text
    • http://netart.hu/userfiles/file/vofulaburiraz.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/sulubopoliperesolapi.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/68849822315.pdfIn PDF document text
    • https://hohsingfiber.com/ufiles/files/kebor.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/35934462051.pdfIn PDF document text
    • http://peoplefineart.com/assets/202109/files/20210904161453184077.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/dovovenu.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/22181044982.pdfIn PDF document text
    • https://pernambucoimortal.com/imagens/files/dalol.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/votulalukogaver.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/fepepozojovisuwugu.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614aff05eedc8---winobimezofodixinuma.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/fixibomasakud.pdfIn PDF document text
    • https://pisangmanis.com/contents/files/zebekajemewopose.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ulenaxugaburepewereroka.pdfIn PDF document text
    • http://anipetkingdom.com/webroot/img/files/nanirorazetuso.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/ranazezakonifizuguroda.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/2189183927.pdfIn PDF document text
    • http://dungculamdep.com/fckeditor_userfiles/file/58363095929.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_off0000ade9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE9 10008 bytes
SHA-256: 909f11c46241be1c8503e077d223f1f0178c051735092cf203b8fa201d286b16
font_01_sfnt_off0000c433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC433 15140 bytes
SHA-256: 2c1362b0d545f6873857407e8266d770f5505fd2b2557bf3d864559d6742e4b7
font_02_sfnt_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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