Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df353ddbdbc1d07…

MALICIOUS

PDF

90.5 KB Created: 2021-06-26 00:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58be4dad994bc9bcc03975bcd7e59a34 SHA-1: 37a5a8509cae53602fe0736fe6db77c8009a9e72 SHA-256: 3df353ddbdbc1d07bd47f13fe293888b3c018e653cc190240358953c78888ec6
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document employs social engineering tactics, impersonating a cloud document to lure the user into executing a command. The 'ClickFix' heuristic indicates the document instructs the user to press Win+R or paste a command into a terminal, likely to download and execute a second-stage payload. The presence of multiple compromised CMS upload links and a high ML score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608485fbe4c60---gezefarezugawosi.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/160969de46a722---zagimuxud.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16077966c3b2be---99264552678.pdf
    • http://aeronautike.com/userfiles/file/pepimotutabinej.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160c9fad1ec714---rixamebefisim.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae933206f78---pijiwajulesunavosoli.pdf
    • http://appartenvue.net/appart/upload/images/90437856752.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089303dd0e64---95128728068.pdf
    • http://ildungrice.com/fileupload/fckeditor/file/46348984764.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca58392dbc---56524395295.pdf
    • http://envigest.cz/upload/file/31000545132.pdf
    • https://jetaime-shop.com/files/pazapududefevinev.pdf
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/vc1cqg661ct17ht4qab5r94ec6/mipivosifejalirutorij.pdf
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e25567cc5a---vikemev.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160b028445591d---17434528318.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160742f75a9fee---tatezugi.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609af00ca4efb---futezurulusuladame.pdf
    • https://fullgame.hu/uploads/files/3401162778.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/ljbt9i9uvj88o2nlfniskfe9s0/vedeminajenujetalebog.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160c64d74ed90e---natopeperujixa.pdf
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/27214920397.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e84a240628---40592421162.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608103b1ea647---sizidexexefata.pdf
    • http://tfh-filter.hu/_user/file/1310252539.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=having+problems+opening+pdf+files
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 16792 bytes
font_01_sfnt_off0001169a.bin
0a0f1e95089bfdc0dc69792aeb01c5ee40443533e50895511a5b1585cb77830f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1169A 17316 bytes
font_02_sfnt_off000143d4.bin
8e1e6d7229ebec52ceca91b411783e387e0ffc2816b364952f18b00848bb97ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143D4 10940 bytes

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