Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc239f78e9bbb40…

MALICIOUS

PDF

85.9 KB Created: 2021-07-27 13:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 34eda277005ffc758654476e5305010d SHA-1: 3c93f9bbc24c0a6a4f920e1b5e085fe721188b5d SHA-256: ebc239f78e9bbb403ad8a760838c395ae67c10c7dfde5d3f90cef7945661f775
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs pointing to PDFs hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a key component in initiating the redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/0eba1c5fd3edc54b9d37bbf4dcf7761b/62569448158.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/mu332t7c9tjg4p5uicsgr4i6m4/xasuk.pdf
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/73047056432.pdf
    • http://csc028.com/userfiles/file/20210610145505_0wiko1.pdf
    • http://talani.nl/userfiles/image/file/15239897379.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe072a1c70---kepumuxowinu.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984c6ec0e67---51868002841.pdf
    • http://www.alrafeef.com/faisaliya/js/ckfinder/userfiles/files/72055337820.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606eaddc42c5f---zogirabuwezugiveguzid.pdf
    • http://accronline.com/userfiles/file/dimasofakilaviv.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f676b55850---14721000489.pdf
    • http://elitaliaweb.it/upload/file/tabiwagedegijofa.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3ofp75td2rb6g0pjaajht0f629/vasesa.pdf
    • https://tecnicadovolante.com/images/file/nefokerijudu.pdf
    • http://zoltysnieg.pl/pliki_wyswig/files/guzizuwokitobodut.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ae941302b---jilinakosot.pdf
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/88125180762.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/wibolukozofusalekoriz.pdf
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/gajukep.pdf
    • https://aordonez.com/images/contenidos/files/42944045351.pdf
    • http://sgpeo.pl/users//file/gebajajixesokazo.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/o57eibun4tna26qoef6abflfrm/xatabemup.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/xegedogarugisug.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ff4653af1b7c3ff3ce100405bc5842d/28736219581.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=phet+states+of+matter+basics+answer+key+pdf
    • 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_off0000ecd6.bin
d5426bb3cd3e2b6b2cec9d4f9cb52e03b6284068e4187baf3033e641b415e228
pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 11272 bytes
font_01_sfnt_off00010704.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 16792 bytes
font_02_sfnt_off00011f16.bin
64e21fcc911b3db52bb6a5cff6e2d298ff7d6ecd801edde28c51a80e1d03d85b
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F16 16292 bytes