Malicious PDF — malware analysis report

Static analysis result for SHA-256 95bf193c2d37d3db…

MALICIOUS

PDF

77.1 KB Created: 2021-09-06 17:35:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7bedd00b584e747d37e0f695258719d7 SHA-1: 5e113d038703a34f181a16cbb2390a85c76ed658 SHA-256: 95bf193c2d37d3db2a6f98c07d177c47afe513745f5c3b2d529c8702b06d882e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. While no scripts were extracted, the structure and URL patterns are consistent with a malicious document used as an initial attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://facades-et-traditions.com/actualites/file/buzakunekejowe.pdf In PDF document text
    • https://usssecuritate.ro/userfiles/file/gejirumedidopesogevakab.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a2386cb9439---nunepegojorepifovut.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/60664985641.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/efedba9246f2bcd8cc193743e39f011d/pikedoki.pdfIn PDF document text
    • http://trivio.it/userfiles/files/66989244200.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087892f945e7---bikenafosag.pdfIn PDF document text
    • https://wavemed.it/wp-content/plugins/super-forms/uploads/php/files/1979c725b751d96963cbffe85cfe1c3a/28944078068.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/3c02f49f6da3d75f0faed11e475d96dd/moriwogijiguvabanufipug.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/08/09/file/20210809_213623_110.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/9m03m45g4t5cn3onstuss9ie41/bedikudulepubiparibuvada.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/76522427956.pdfIn PDF document text
    • http://metallpress.ru/files/45472021425.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/54707082351.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/sovuwagugukafa.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/66253d709e9dd44be2ea8c57e8794f11/laxejazokinilejub.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/5ceaa6483ef68e7e67d428b161f0f4e1/fikaguxatasagabagitu.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/85f86f62dab998bc620b48f93a054a2f/5516795486.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/wukanojuxuver.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/99943142249.pdfIn PDF document text
    • https://spacio.hk/attachment/file/54120010252.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/21785419203.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a38be111b5d---dexedakonape.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/94508906895.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/29053429593.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=download+pdf+file+reader+for+jio+phonePDF 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_off0000c9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C7 17080 bytes
SHA-256: 631d98237900088711a37cbe1d26d1b59ed03733db4f8a65f219ae7e3e9988c4
font_02_sfnt_off00010e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E63 10548 bytes
SHA-256: 1fcc094cdd9ce8a21b0349afe7836f841130b29e02f5fccebfc7eea81005d919

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