Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97a5d02cbe52840…

MALICIOUS

PDF

75.7 KB Created: 2021-07-31 03:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 28fb4884756f7e3202c34ffc210c0b70 SHA-1: 1f9004066c05c8d6e1247758d54f089d9e52cf52 SHA-256: f97a5d02cbe528405e18936a7b2dfa9c9128d199e54e716b5591b37e53a1d024
196 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier. It contains multiple links to external resources, including one that appears to be a download link for a DLL file. The document also includes a lure to execute commands via the clipboard, likely to trick the user into running a downloaded payload. The presence of these elements suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://irlanc.ru/uplcv?utm_term=pes+13+rld.dll+download PDF link annotation
    • http://waukeganeast1980.com/clients/877304/File/nazonaxapalegikadejujola.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/97027362429.pdfIn PDF document text
    • http://akssert.com/userfiles/files/sibekokuxoxofazibabexanu.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/romitegadetibos.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/19720623848.pdfIn PDF document text
    • http://hvpeds.com/upload/contents/file/valevetekinesurarazalevu.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc024e07b2---19139086601.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/72064bc06951fc287d0ed74ddf54bc42/vusobigedelo.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/29690044663.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/69998254347.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16084d54d7f662---zakudajugudatojuwudanofe.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af6fc3a2e98---bizogexevozivawa.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/c3cc295oi4poep9hsslotd2tk4/30190329239.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/3202582979.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c55226be845---25141299330.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160af59d9a2204---43944468660.pdfIn PDF document text
    • https://mimpiindah88.com/contents//files/votinijuronasifow.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a44d3f68e46---mifili.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/rso92h2fqscnbrulvrh1c02f6i/zafiwisezodikuvamowaz.pdfIn PDF document text
    • http://ddservice-bmw.pl/userfiles/file/kuvenesikotox.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/mufizofi.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c941e29ed1---88775396834.pdfIn PDF document text
    • https://soosekszer.hu/upload/files/ganizoxidodaritowavuma.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/c434f70e2f62f6bf4cec479d1abcc8ff/41354887730.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/i0cc6iite7lc1bqn7dbcs80i52/32976260317.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_off0000c5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF8 10428 bytes
SHA-256: 0153b8701cf96af25572b439a3178e3243ef93a62ae7c2c677c9608b4fe60c03
font_02_sfnt_off0000f5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DE 16296 bytes
SHA-256: 6f2adb24ed3a75279ea69f5bf15cbfb65f346c2d5bd84310ff9c532623dd18ab

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