Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ce2d927bbccc69b…

MALICIOUS

PDF

83.9 KB Created: 2021-09-12 13:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 45b5b196c99bbe661660c47c9061a831 SHA-1: d7730a46eedadaefbe40435db3829d0ee9a155e0 SHA-256: 0ce2d927bbccc69b84fcdf443c9e7df2d5e01618c63b2a208c205c99c3eab76a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV and ML classifiers. It contains numerous embedded URLs, many of which point to PDF files hosted on potentially disposable domains, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://ecableapp.com/FCKeditor/FCKimgUpload/file/52018061782.pdf In PDF document text
    • http://cn-polylysine.com/d/files/bofebuzep.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/sejadumuwobe.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/68922335089.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/77254013739.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/2431623585.pdfIn PDF document text
    • https://restaurant-kamkok.fr/img/Data/file/75262857760.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/kukobifezel.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/97204576682.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/66739296246.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/36fb4cae2f429bfa84cb58fddfe8423f/71779070821.pdfIn PDF document text
    • https://fsreloading.com/userfiles/files/wimitijuwojiteda.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/2961676974.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/80535658373.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210904015735.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/mowakulu.pdfIn PDF document text
    • https://sentralperdana.com/file/98516345171.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/71659233880.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/74988185567.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5a097e3cc---febisowozegamunogaz.pdfIn PDF document text
    • https://amoslodge10.org/ckfinder/userfiles/files/53422177460.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/54187929384.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/30936785638.pdfIn PDF document text
    • http://cdn.eagle.mn/uploads/userfiles/files/50569577487.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/87147915882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=watch+football+factory+free+online+123moviesPDF link annotation
    • 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_off0000e23a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23A 17788 bytes
SHA-256: 3416bce0ecd52dbc9cb9d7b131a18959eef42b049f0b30d72f3c50f7db3f95d3
font_01_sfnt_off00011065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11065 11260 bytes
SHA-256: 8fa436d7de42bec606f3c44a0bda044d1e96ddf796e24f0f6f3a7f38d8faa8d3
font_02_sfnt_off00012ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1