Malicious PDF — malware analysis report

Static analysis result for SHA-256 795bdd95d3b8e7d4…

MALICIOUS

PDF

84.9 KB Created: 2021-09-08 07:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ee11ea02a31be3e2707189130cf7ddca SHA-1: 41c36a4dcda7da06f1f0f429214bb0daca3d31b0 SHA-256: 795bdd95d3b8e7d47021b626530a1147ede68d330cca5e0fa70caadc3a8c3ddb
236 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

This PDF document employs social engineering tactics, specifically a 'ClickFix' lure, to trick users into executing commands. The heuristics indicate the document instructs users to copy and paste content into the Run dialog or a terminal, likely to download and execute a secondary payload. Multiple URLs pointing to compromised CMS uploads and disposable hosting were extracted, suggesting a distribution infrastructure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://laborke.ru/uplcv?utm_term=remove+old+windows+updates+manually PDF link annotation
    • http://kurdumovldpr.ru/uploads/files/lifegatujivuxijode.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/risinewenes.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/o6c8lu2c4q4l0ksjojggfqbkkn/10305463022.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ojgb6l8vi86v1s2s35g6sodamp/vukodojidomapi.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160cc596adf67d---zunuvotivawenax.pdfIn PDF document text
    • http://www.heksan.com.pl/file/tesuv.pdfIn PDF document text
    • http://studiopiergentili.it/userfiles/files/50702274.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/d9c4ccaf380164d67b79951a736874f3/81063866531.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16117b4c699ca4---deritebolikava.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/apo8p5k64lc8ildjaco3e3rnsl/wesexufazez.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8023e10d16---35079489091.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105b31dcfc68---xijirobe.pdfIn PDF document text
    • http://quiltingacademy.info/fckeditor/userfiles/file/49934884754.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/netufiwuboji.pdfIn PDF document text
    • http://akssert.com/userfiles/files/sozudunuwolab.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/18474297745.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/0215b247068296142c7adfdcb2f3f0b9/susen.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/jogumutiraga.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/zuzababuvu.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/55915018518.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cd678993870---84844328609.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/50042438580.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d5c45a3af---jimisiwekemetunesomiximi.pdfIn PDF document text
    • http://spc1991.com/ckfinder/userfiles/files/kexori.pdfIn PDF document text
    • https://hideab.se/tc/Mediagalleri/file/wibemomotumef.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/78ijcprkcrs1e0lctgv1opn9sp/linaj.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/getokajuxafalulemat.pdfIn PDF document text
    • 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_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD4 10864 bytes
SHA-256: c2cd401192c6f695b56a41ec33024dea7451d0160b5f01124c1c9861285f3ea5
font_02_sfnt_off000115ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FF 18408 bytes
SHA-256: 1dc7233f5be262df99d202b94de27f482a54c8687fff3d43ad87f8f9501077ca

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