Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcd1a890c7bd5b2…

MALICIOUS

PDF

76.1 KB Created: 2021-09-01 07:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6020e70f6b4fcbab29a90604fb7bdc30 SHA-1: 3c768183cb42754e379acf793c87ed3ce9027a10 SHA-256: 2dcd1a890c7bd5b219d11d7c5ef868af4263f0d1c1a9112dfb5e2f17cc0943ba
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is flagged as malicious by ML classifiers and ClamAV, and contains numerous links to compromised websites and disposable hosting. The heuristic 'SE_REMOTE_SUPPORT_LURE' indicates the document likely instructs the user to install or connect with a remote-support tool, a common pretext for gaining unauthorized access. While no scripts were explicitly extracted, the nature of the links and the lure suggest a phishing or social engineering attack aimed at facilitating remote access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/be791877b1aa6f20dc5cec134d992480/warifonawemokezewaguz.pdf
    • https://gamedunyasi.com/calisma2/files/uploads/42215489813.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jawoxo.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/fokilikepolufese.pdf
    • http://dentish.ru/ckfinder/userfiles/files/bazot.pdf
    • http://dienmaythanglong.org/uploads/files/goxez.pdf
    • http://hainescentreasia.com/images/file/fumitibexakuwozorujup.pdf
    • http://www.pranabkumar.com/fckimages/file/xolodasogusodijemujovi.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39792da9a2---45925779411.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/73304f79ff56b32af54c1b349fc7ab5e/66242151980.pdf
    • http://antifftech.com/uploadfile/file///2021062310501616.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/122411282791a29bc3294bc989ff3bb5/jabag.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d484ce9e4---fuzinuzitusilezi.pdf
    • http://lynhuagiasi.com/Images_upload/files/kukejilunivi.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/2dccljf4s7rn7spi05gsnidv8p/10563036446.pdf
    • http://cambridgekapurthala.com/damana/userfiles/file/63830397289.pdf
    • http://orchid-daikanyama.com/userfiles/file/niraxaxokexefixusewe.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/hkfki48i7cht2dpjeslkhodo20/kalanofamo.pdf
    • http://nnhs1964.com/clients/a/a2/a2d7b74ded15306de89ee4bbe2f7ed3f/File/22355130387.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/d7764f0e177c3e6c1e4c81a9ea780d17/demumijudot.pdf
    • https://cr2tek.com/userfiles/Proj_Name//files/64054797477.pdf
    • http://accessprecision.com/userfiles/file/85190383299.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/abfc6a706535ff126f368d9e5053d91b/divomez.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=corruption+in+business+ethics
    • 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_off0000c3d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D3 16792 bytes
font_01_sfnt_off0000dbea.bin
9988fbf06a5d462efe314558d5215664354089ab1ea4cb95f61050457d3c4324
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 10532 bytes
font_02_sfnt_off0000f3a6.bin
53b96bc5393700f14016a041e07857ba521b630ac3ec8371ce7d104c814d4181
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 17648 bytes