Malicious PDF — malware analysis report

Static analysis result for SHA-256 926ea5bae1153cb9…

MALICIOUS

PDF

96.7 KB Created: 2021-07-06 04:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 8da9bdafdbfe4344a14a9638f3dbefd2 SHA-1: 390c782caf7d5f6f11cabd50a6193efc1e2d5b89 SHA-256: 926ea5bae1153cb9cd20ba1b4106cfdef3916a4613dfe18d57489574c7633c7e
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: User Execution T1566.001 Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

This PDF document exhibits characteristics of a ClickFix social engineering attack, aiming to lure the user into executing commands. Heuristics indicate the document instructs the user to copy and paste content into a terminal, likely to bypass macro restrictions and execute a malicious payload. Several URLs point to compromised CMS uploads and disposable hosting, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://bdaudit.ro/userfiles/file/85541398889.pdf In PDF document text
    • http://szolnokepul.hu/userfiles/file/90239473686.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/6fc57093a76834c858432992d2ed4d45/41475816371.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/menujijarali.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16070ebacb8461---96139628294.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071ec0c8f401---98507694447.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fd53aceb0---80219879644.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/etb02nbsuu2ro6nr4p1l34a3p9/wazapuwefapazadix.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/799836832.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/gakuwifowalaxusokiv.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/dojenujapinafagoxegozizit.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e086c75764---xumalivinelodatifugimosuz.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/datobamomatude.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/o9t0q998e21f8q9uk2qqtured9/wojufizoxirefagalajet.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984a5ddc566---sulaweborajo.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/o8aa8b008090qj4hk5uvb21qr6/87967575765.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ub5rittid3ek0s77of0bjkpisn/visun.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853f0d6a607---82618289907.pdfIn PDF document text
    • https://citrasas.com/ckfinder/userfiles/files/gigizaw.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/0cs8v8c8rjkeu82f7iujpeb880/60039586151.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/4b56343f3b028db3a3d39038994e9895/gepegesopaligefadadapilen.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab67c0c81ad---85174153714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=most+useful+cmd+commandsPDF 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_off00011685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 10536 bytes
SHA-256: 0d0f6dacd4a47f8f3128623e7b714ccdb0abcfca6e62daf7cb2bc566aa6dc2c8
font_01_sfnt_off00012e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9A 17692 bytes
SHA-256: cbf53dec20d44cf6e831bf1b2e877825699325fef808bb0818519373cc712c7f
font_02_sfnt_off00015d61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.