Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ba68eecd017dac…

MALICIOUS

PDF

105.4 KB Created: 2021-09-01 09:18:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 449008e3b3abd50044e37f85c8910340 SHA-1: ab53ceabf786dbb8781472a9e1a3eaa156b3312d SHA-256: 78ba68eecd017dacd3314604a421e33135334744ea90fbdf1539dd15242fc274
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File T1204.001 Malicious File Execution: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing and trojan delivery mechanism. It contains lures that instruct the user to interact with remote support tools and to execute commands in a shell, indicating an attempt to trick the user into compromising their system. The document also hosts numerous links to potentially compromised websites and file-hosting locations, likely serving as a distribution point for further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 8

  • 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
  • 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://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e984e6edec3---nuvopar.pdf In PDF document text
    • http://insei.eu/userfiles/files/bepogadufozuvanawiverezak.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9d74da7fb---wovokuxofaloronoruwazalik.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/7a126321bbcf90e25267203b42c95974/7483262057.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607293eb17e81---24547924832.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/85196ae09e65d63d9b94ece2ffacd148/49307893135.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/fevarakafotumixezut.pdfIn PDF document text
    • http://gevenschoenen.nl/ckfinder/userfiles/files/vukajutuzukukodezef.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd363ce187---35388098031.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/jaxowifawez.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/126uh4ml129euo7uhgsitjjj8v/86635499747.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/53607267773.pdfIn PDF document text
    • http://stagnesreunion.com/clients/e/ed/ed16748122b3ff8ec97113314e0446c4/File/30416113119.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc3283e40c---62346234048.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/34915976922.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/6efje9sdankns9qm325v73n952/82588729411.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/tadarilojufagakejanojugi.pdfIn PDF document text
    • https://digireg.it/upload/disozulaxunarivedej.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/41900542796.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/jivupenigug.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/jatik.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/lo46imqems5pfpktmuvcl4hj3d/wedejitinugu.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/80044583322.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cmd+prompt+clear+screenPDF 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_off00013108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13108 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001491a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1491A 20044 bytes
SHA-256: 10774fa7305da9a65c725900923845a2f89c6aec59bff0a7837699b8af0f7051
font_02_sfnt_off00017e88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17E88 10612 bytes
SHA-256: 2c26d03811d361cbf7bc1b27e8d4c206b4c76778e0d6d3afef26385928e628e9

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