Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72bb33c68d6be6c…

MALICIOUS

PDF

141.4 KB Created: 2021-08-02 06:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 363eaa12cf8c817a1790369a6232a51c SHA-1: 2f52a2e8fc3fd349c2869da1250341968a598b64 SHA-256: d72bb33c68d6be6cea62af234f3f5629bf7996d1b859c525de26e929d4b4c9c4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a lure to execute commands, as indicated by the 'SE_CLIPBOARD_COMMAND_LURE' heuristic. This suggests the document is designed to trick the user into running malicious code, likely to download and execute a secondary payload. The presence of multiple links to compromised WordPress upload directories and disposable hosting further supports a malicious intent, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db1353a597---52596600372.pdf In PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/22qa049g1d19a2fjhedf0916oo/370613172.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/bpk3g2dhlk5c4vsacitf1j1edg/piburireve.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fcc7171e006---mimilesaxisusabiweri.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e7d8a8ae6---58064041271.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/50032289010.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaa09d5b64---nuferixegojiweniluzuberu.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/ffb123fc0b51b744c5f78e3fe4cbee11/19590587110.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/xasarisoki.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/monisajulazezogifunuwezuj.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ff611d19b---pixigiwen.pdfIn PDF document text
    • http://www.umadai.com/ckfinder/userfiles/files/gulinalumobotekuxe.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/e285caf90e2f96492dea216c59a21d14/jafijirazokegejelusega.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18780787532.pdfIn PDF document text
    • http://www.scsk12.org/policy/files/files/juzudazuzizumudo.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/0v8h82p29s9p3sld53m0n5995j/68086119251.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/junekafunuwomom.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/38428912172.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/bol3qepko8uraod101kabdsdua/30875474607.pdfIn PDF document text
    • http://laclonghotel.vn/upload/files/87954053813.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a43f05f034---mowud.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/xosorururabikisusawo.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4f7df3463---ziwimekutekasuzelox.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/70718884490.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+pair+mpow+bh231aPDF 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_off0001c659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C659 18492 bytes
SHA-256: 9927d6ab8b22c28b2d6bb9da38b47da086a26a1278e1bada45712470b88a5678
font_01_sfnt_off0001f761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F761 10628 bytes
SHA-256: ae30fa96b23280f8c9fb6b925649906fe4b4b554fe129448a3a01d5d3bea1f2e
font_02_sfnt_off00020f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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