Malicious PDF — malware analysis report

Static analysis result for SHA-256 93fdfb6404651ef7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-08 10:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ebf848bb89e4cc5de145fac39d953a58 SHA-1: 414344e7b9a56c2fd75029f4d140993a90392349 SHA-256: 93fdfb6404651ef74ffe4ab52cdf2174d62c2b6dc4b5e399e71fdd3de922d79a
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs users to paste content into a command-line interface, a common tactic for executing downloaded payloads. The presence of numerous links to potentially compromised WordPress sites and disposable hosting further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://oreade-breche.fr/userfiles/file/panojobuwesusoxubogitibo.pdf In PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/a9f6eaaf526a87ae7a2a0c1836c884fd/89654149238.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/6bfb10ad53d0ef7e3cfe7b7ce920de09/73773843220.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///3586417988.pdfIn PDF document text
    • http://vorne-sitzen.eu/pcms/content/file/38125508888.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/o23mgfkjoo5rmlauh9olg9e4kh/xikigesolopamumen.pdfIn PDF document text
    • http://oris-am.com/editor_up/biligegoxufopujakiza.pdfIn PDF document text
    • https://olterus.info/contents//files/molenujomufenewijol.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/50492290522.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769bdc355ed---xexomitizelorogegeza.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/49482990467.pdfIn PDF document text
    • http://ig-einheitsloks.de/medien/file/midegeveg.pdfIn PDF document text
    • https://senesi-sklad.cz/userfiles/file/xobizatekiviguvokoduvodo.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ik4n9s6qgfca9d0qjsrvs6bio0/wibinivutu.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/916fab95b96f361aa22a5a6e9c039906/63145397239.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/lfnce03hrkooafjv812q13bial/lolazafumalugabimosikexu.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/bitamigovetavipusegixiwon.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/maliromabolidowi.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/a5dc0453c1c6f1be87186e2e44070fbb/pekareguwefari.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/42575935723.pdfIn PDF document text
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vorapanenopilote.pdfIn PDF document text
    • https://dolupin.com/calisma2/files/uploads/89002159599.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161221372b6e7f---lazuperuwuwejogagubik.pdfIn PDF document text
    • http://geosond.pl/userfiles/file/dekidifonuzazov.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/r40065retgi2re5cjemc4tdvic/68925782096.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160941e09c3879---pefotivezufakatefewas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=static+and+dynamic+ip+address+pdfPDF 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_off0000df37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF749 16760 bytes
SHA-256: 7d7a15728c77636f95a619f83b61989b4f440fbe8e241d37d48604b768269fcc
font_02_sfnt_off000122ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EC 10804 bytes
SHA-256: e1ad98b820179f300833d49057b0dffd5b6eca054bb1cf6b3fe4ced27bed151b

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