Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d6e574bf8a3ab9d…

MALICIOUS

PDF

68.5 KB Created: 2021-09-16 11:38:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1d68b94fa17781709b7587a5b8254f35 SHA-1: 6acce2e2d8e58e1211f200aa1f705dd0d3e832df SHA-256: 2d6e574bf8a3ab9d1a00bf935b33315f2a79f5adcdfa1453b5aa5bdc8d73d5fe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external resources, many of which are hosted on compromised websites or disposable domains, suggesting a link farm designed to redirect users. The presence of a 'youtubers life android' UTM term indicates a lure for potentially unwanted software or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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://infrive.ru/uplcv?utm_term=download+youtubers+life+android
    • https://unitedfightalliance.com/ckfinder/userfiles/files/mebemotiw.pdf
    • https://cantarefides.ro/admin/userfiles/file/vogiwidu.pdf
    • https://iwanbim.com/userfiles/files/zametego.pdf
    • http://wieswioska.pl/userfiles/file/27052540178.pdf
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/ea1d4jsth1v1ggsqi7ccjfccn4/95288074747.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d77be0dacb---80786096545.pdf
    • http://hyundai-dongdo.vn/images/files/wenotanejedewexogodago.pdf
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/zujaroninogu.pdf
    • https://marwaautorepair.com/nbloom/fckuploads/file/99424231734.pdf
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/v7lla88bcvnk6da1be0m5d53f5/34650987870.pdf
    • https://encoyun.com/calisma2/files/uploads/83388250483.pdf
    • http://anpharma.net/upload/files/99372096499.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f98468cd38---webeku.pdf
    • http://grandviewcommunity.com/userimages/fivijelipexenesegefukit.pdf
    • http://wmc21.com/ckupload/files/79174505217.pdf
    • http://hiro-seiko.com/upload/files/pefunene.pdf
    • http://sportschoolindex.nl/images/uploads/pixudakerumefuxejoxufa.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130bc0ac06e8---bijezebunizipizelesidux.pdf
    • http://bitree.net/ckfinder/userfiles/files/86227238454.pdf
    • http://geotersrl.it/file/bobuwoveri.pdf
    • http://veszpremkosar.hu/_user/file/92221443098.pdf
    • https://pristineleather.com/userfiles/file/porose.pdf
    • http://edins.net/userData/ebizro_board/file/10089004315.pdf
    • http://screen.by/images/file/wezag.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af97.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF97 16792 bytes
font_01_sfnt_off0000c7ae.bin
5e7284a758904e5cedb25d0716360d035d45636427cda7072e3d14ec6a9c16f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AE 10788 bytes
font_02_sfnt_off0000e0b7.bin
1b5aa49b17756ed48147f161ce54b0193e0c06973644585f7c8292d1a01c1e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B7 14428 bytes

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