Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d3f1b0cb3e70ef…

MALICIOUS

PDF

74.9 KB Created: 2021-07-07 01:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ac8ee7240e1d9e5ec60021c93ea73aa5 SHA-1: 18ae3337e69c586a941440c8f9cdea9c0d0766f7 SHA-256: 47d3f1b0cb3e70ef5d71bf70f88aa1cfd7308f40fd8b02fb3432cb44d1d7ba65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links. The file's purpose appears to be directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://crisismobile.com/ckfinder/userfiles/files/22064851181.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160925704cda0c---sasadifaburarim.pdf
    • https://autotrans911.com/thread/admin/uploads/file/nulagemopegenufi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ec6925e26---wusafirumotaxapefowapipi.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16080d15468b71---10092739537.pdf
    • http://niestachow.pl/data/aktualnosci_imgs/file/28647378533.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075bf1644f20---sebozamadovupojurav.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4553e8feda---kasadexivonun.pdf
    • http://meble-tk.pl/userfiles/file/29137002829.pdf
    • https://hijaulumut.com/contents//files/kutovumibaka.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/3ec8e5e15997f40f2e9eb3aa8d938989/49531365598.pdf
    • https://clove7.com/userfiles/file/liniwufugazinosavupazuxi.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4ddc12ff3---nejifedafuxu.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/19003965114.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ca9d1ecc0---83604234489.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736725b8386---54992483985.pdf
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/84udui4svo6iese93il1tifo90/39009295269.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/7d5lj29v7e33lj7obcommp0mgl/22934339038.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090be800edfe---joraveliwazin.pdf
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081ec2e9ab7c---49562785908.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/leguza.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609e74cc70477---xosezawopuvirexe.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0a18e29a1b---wenurolov.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=write+an+equation+for+the+line+tangent+to+the+graph
    • 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_off0000c2f1.bin
0349a526f192162655ad8b804faac427a0484c09653a4e2ce4ab7bd09f5700b0
pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F1 10708 bytes
font_01_sfnt_off0000db21.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB21 16792 bytes
font_02_sfnt_off0000f333.bin
e2d9cc0ceb2550d2a0c5f0ed6a66a801e3097e53e18003990ea967966fa39c89
pdf-font-stream PDF embedded font (sfnt) at offset 0xF333 16404 bytes