Malicious PDF — malware analysis report

Static analysis result for SHA-256 2951fe9f8795bbba…

MALICIOUS

PDF

89.3 KB Created: 2021-06-28 02:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d5d6cbe6db51f731b1e9c74cb841dda SHA-1: 827ed24baa106036883fa8b12a085bb4d8a918d7 SHA-256: 2951fe9f8795bbba52d0747c61bda7ac801a6ca1b92d3b1589783278183676cc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The document body is unreadable binary data, indicating it's not intended for human consumption but rather as a vehicle for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://tonitomov.com/picture/file/54985988089.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098a7dfd7091---kovisuvunavozisomadajuw.pdf
    • http://xboxheerlen.nl/userfiles/file/38423502993.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/6445484232.pdf
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/patimatoviguno.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f53f6343a---dipetew.pdf
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/xuredojax.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/493928c5359437f285e9a1483afd8e7d/57214930902.pdf
    • http://cdmatik.com/uploads/file/xuxagenegekulanovinid.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/q6bhc53pa8p4t681fc55irph1e/kukeno.pdf
    • https://barcelonamedicalcenter.com/files/galeria/files/zokusojerojowemijoxekuxi.pdf
    • http://atut-biuro.com/uploaded/file/92019566676.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac726a6ce1b.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609119544990c---fedizawuruminosexagagafo.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609617c2c596b---11482000646.pdf
    • https://tootooair.com/FileData/ckfinder/files/20210628_8E0AEC9149C016A9.pdf
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078419d2dae4---jatoxumopom.pdf
    • https://adepotcustom.com/UploadFiles/file/20210523095615153.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606f470744432---fexivapunofaleni.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ab936b88c---nugifadigasagewabavadiba.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/832868deb9d74f2c45ce01df5de9a2e2/6911835877.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6dd422f92a---dubesufilagulanixawalib.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3b85cd83e282c49f4d179ca4f8033606/91992514693.pdf
    • https://areicon.com/images/file/gufazubalokefo.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a71fc81ef18---64133371379.pdf
    • http://www.emailposte.com/pictures/forunipapuvubatitesilo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=types+of+stretching+for+warm+up
    • 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_off0000f75f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF75F 16792 bytes
font_01_sfnt_off00010f71.bin
97c1d7b238affece097e7da079129efe0cb28158577262289d16a69e41e7452c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F71 18424 bytes
font_02_sfnt_off00013e09.bin
1eb3be8a32848fd89b4baa19774668aebd44b37cd98e2b34e397a55fd29e2019
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E09 11144 bytes