Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e4886cffe7aae6…

MALICIOUS

PDF

77.8 KB Created: 2021-09-06 19:18:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e660a9c130be6dbb0e8e7601da49c08e SHA-1: d77467cc91b73dfb9c425d54896776e65acd97f0 SHA-256: 11e4886cffe7aae6f7aecada725efa96d3db59cbf070395c6ba2c407d7294f99
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pistant.ru/uplcv?utm_term=vaporesso+tarot+nano+manual+espa%C3%B1ol PDF link annotation
    • http://maxidmum.com/images/upload/fck/file/45222987049.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9454f0e9---pukakifavasegipujuronatuv.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/e0afa4f45eddbb9ff1ca7aeaaf1ce43b/86648134571.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7d55ecd2c---96419130010.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/48060671548.pdfIn PDF document text
    • http://sam-global.info/files/file/95973509506.pdfIn PDF document text
    • https://alariel.be/userfiles/file/veropubosazeguxe.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/bopilupup.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ffc775ecc1e---39166832541.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/vevola.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/04238975675fbad80d1edf545665e6eb/89851929807.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///dibazexudupixi.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ec1fd92ab---6192953148.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c26f72c87e7---semokaxepiduzim.pdfIn PDF document text
    • http://firegallery.ru/img/upload/dizizufawifatonu.pdfIn PDF document text
    • http://sisparts.pl/zdjecia/fck/file/larirukofulesovudisob.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/91434589031.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///lotozox.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/kepikuvezim.pdfIn PDF document text
    • http://surausa.com/uploads/files/gizikekaf.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/nesibapu.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16094da1785faf---51704086454.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/90021254141.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_off0000c542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC542 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD59 10596 bytes
SHA-256: e9759f4ec76eaf49859f77c37ceab30043ea1179728bec9c60b1617f60f4909c
font_02_sfnt_off0000f556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF556 20044 bytes
SHA-256: 8f79cba3ca713928cac5e63a5446869942edf1c5c11fc194865fed15a4a9e2e0

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