Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ada02eced2aea1…

MALICIOUS

PDF

76.4 KB Created: 2021-07-06 19:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfc9d39793f71ff87ffb51d02fba3688 SHA-1: 5684778efcc73f0215a7182d9e49fbb6aea80b3c SHA-256: f6ada02eced2aea18d1f64c4d7d5f900fc0fe983768e832a4d537983065f960c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The 'Clipboard command execution lure' heuristic suggests the document instructs the user to copy and paste content into a shell, a common technique for executing malicious commands. The numerous embedded URLs pointing to compromised CMS upload storage and disposable hosting further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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
  • 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 http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ac6d6e61b33---fagetuzorisuwis.pdf
    • http://okulsanmalatya.com/imgup/file/18795154476.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/2e25fc68639fa78da2ad7e94efe0c033/wewaxo.pdf
    • https://asset-books.com/userfiles/file/ximorifikavagogizepa.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ace435c0a9---jejaluxozakitu.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/771fed3057cc50a52d5ea38e43ecc257/wasixanumoveka.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c27ca63e276---91250196801.pdf
    • http://colorfulmedia.de/fotki/fotki/file/nujedajikafelasizofenol.pdf
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/87682812204.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/b413842281b6e30027c7ff3d557f75e1/87690977921.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/14b712df789090c74cf53d583b9b44d8/mokupazu.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608752d9b09b7---99052438514.pdf
    • http://thucphamchucnangmy.vn/uploads/files/86450891257.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16077bc198464a---fakorosujokorulofufile.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdd55b3b39---jetijokumazaresuxufepi.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16084023f6bf31---tibirazuwanetute.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/zewalaribob.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160964ae4f1e6f---45570750402.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/f653d8db9f21d4a541919a7b00982df2/21823494668.pdf
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608756d043cb8---54547103339.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c41025846d---birakudu.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/2713b22015ee91f45a48947fa865b990/44569010906.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=php+pagination+example
    • 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_off0000c6d9.bin
f3d9f0d7e2d8019690f750ee896102895d1ebacf31b0b2e6ac33270e7ee87f3c
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D9 10532 bytes
font_01_sfnt_off0000de9f.bin
9c5420d20b43fcd09ad3ce1889e815731752eed3d4119fef9b015907118895b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9F 17468 bytes
font_02_sfnt_off00010c96.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C96 16792 bytes