Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee3ffb7a1fded1f…

MALICIOUS

PDF

78.7 KB Created: 2021-07-17 09:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f26dbe17d38e53684589405d1842ac42 SHA-1: 29bc4125915787e1982f82112b80dd985c0ab8b2 SHA-256: 7ee3ffb7a1fded1f1c779d04859666bda969b14f31c3fec54eb33543d53dc485
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and other potentially malicious domains. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links strongly suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160f1fbd67e124---53587480706.pdf In PDF document text
    • https://aviatroglo.fr/IMG/file/11674106408.pdfIn PDF document text
    • https://lotte-ppta.com/beta/assets/file/80607051830.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2621adf9cd---93678592615.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/sizupalovofewapezisaja.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xabasosigenogewodisedim.pdfIn PDF document text
    • http://mytmbc.org/fckimage/file/semejeneked.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/d6769f48a4f25fb640038d7e9a07ff36/limujevajutasusulogev.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/t3n1i58iabbeng6iqns2tci7uv/57782232855.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/22137218301.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/wagifixoxuwofenowujut.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/a133c0ad169eafaf49abc285c633eef0/gurirew.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/014bc5034244e427ca500c1508599e2e/47549984482.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/6712410901.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/d305feccafd3290c640f45868ddbb3bc/31621160392.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/91403398046.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ef0eb0e55---pedokomifajezenefajefa.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/c76bedd42bce136bc500fdf4c4b58a25/luful.pdfIn PDF document text
    • http://gorillatheory.com/admin/upload/file/36126380280.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/v9e3qvaor45d7p9cgu9mf6mleg/97137479024.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/83916743348.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfe60d1301---dopadagolajokukadoro.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a147f0a6fd4---33666112648.pdfIn PDF document text
    • https://nbtele.com/en/cache/fck_files/file/18009011869.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=about+short+circuitPDF 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_off0000d3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C0 16796 bytes
SHA-256: 90b35e0a420caa50b2294ca4810ad1a39138903205ef9d9972d4172a79f539cd
font_01_sfnt_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 10104 bytes
SHA-256: 46ac10d72ad55ac3a1d0862968c164d0b70b2edc533fa4fb4726763a1f892d42
font_02_sfnt_off000115b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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