Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2416cac06ddbb87…

MALICIOUS

PDF

84.1 KB Created: 2021-07-03 05:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 8911bd9e6bf23b1bba451fd8baf0c40b SHA-1: 5df5d63889e2ed11a468703cc18d44f21def6210 SHA-256: f2416cac06ddbb87875ce7d768bcae446b61b9e0838e04c5bcab3355cf441879
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a shell. This, combined with numerous embedded URLs pointing to potentially compromised websites hosting PDF files, suggests a phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/b0cqkbijja1i4759lgtlvo5e0a/tirimajumep.pdf In PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/44741734524.pdfIn PDF document text
    • https://prawobrzeze.info/userfiles/file/48654579939.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/11383444599.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff2974b4d5---zoref.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/skbop6vncrjcldg7ns65nmkl4u/sizagezed.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160833e15a8257---88204093447.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160beeea4d80cc---jobonifupugejaja.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/wupizedutev.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16086f87b4091d---32196824515.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/digutevifafasikuvukugod.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b47b81999e9---75120230819.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779b7596a5b---22960323743.pdfIn PDF document text
    • http://bronia.org/userfiles/file/gaginetedevupi.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160971209d0255---58764940936.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/95500dc1a74787a6867c1f3014c5b485/58055405571.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de41a835cf---jinurobesurikelo.pdfIn PDF document text
    • http://kino-cosmic.ru/sadm_files/84293240109.pdfIn PDF document text
    • http://htwy.com/upload/file/gavegol.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/29395911152.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/mukesijivib.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/vepemi.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/90888654738.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/b185b703a13292e166c4dd276e245d42/73067528452.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=vcsa+6.7+503+service+unavailable+failed+to+connect+to+endpointPDF 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_off0000e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C8 11600 bytes
SHA-256: 44bcbfdc1e8c15d39e7f049f9ea6cd5a268e8a3d4862323be01379ca802f87aa
font_01_sfnt_off0000fc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC58 17748 bytes
SHA-256: 6bef37be1cd33e2b9c008d8484edb509051adfefd6ade2925e3a18633e724240
font_02_sfnt_off00012a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1