Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabbbb48e2df0125…

MALICIOUS

PDF

82.1 KB Created: 2021-08-15 16:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c7aee606beb0d86b7cf3c03ccc50d3f SHA-1: 98ab548619d1dc875d371ca26f109cc906f382cd SHA-256: eabbbb48e2df012509ebb4e5aebf1351e664088c0ff87d1325060c036f249338
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. The heuristics indicate a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malware or phishing content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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
  • 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 http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/dogot.pdf
    • http://romanakladatelstvi.cz/userfiles/file/36138644442.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40a344cf61---62952617386.pdf
    • http://gchsclassof1970reunion.com/clients/6/6a/6a45fbe13d63dbb0eb8070d7cb9dbc89/File/denixidopogilazoj.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c55b714d950---11294450290.pdf
    • https://tjpapigroup3.com/contents//files/11333692800.pdf
    • https://songhong-thudo.com/img/files/solarotiwat.pdf
    • http://mamnonlittlesun.com/upload/files/44798690380.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609d767999567---68558606416.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e403d7e2f5---96166569043.pdf
    • http://live-net.it/file/zazudelosavelorupi.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/258a44d6b1d1387e26088992682cc099/32478854122.pdf
    • https://12shio3.com/contents//files/2328543932.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe6f00209---28788272247.pdf
    • http://barcelonasixtytwo.com/userfiles/file/58066886088.pdf
    • https://elger.cz/fckphotos/file/menuxipuwigomeba.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f834e04d5c8---62274152550.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851bd93c484---45501532546.pdf
    • http://umhouses.com/uploads/files/78744876176.pdf
    • https://terracell.info/images/file/jujadixegegenenategisaso.pdf
    • http://tramtronbetong.com/uploads/userfiles/file/fararotozivovexogofafiv.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1b4e68ae6---xunizabo.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/88i749kdnv31ss3r2vi0r39bgo/texejanemupomaxekinorek.pdf
    • http://desagresbrts.com/clients/34568/File/matizukekapitotodixolasok.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/4muujk5abucdqbi8kre8mcvq85/81101407369.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pokemon+emerald+randomizer+download+zip+file
    • 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_off0000db68.bin
9e2d874bf06032a91f68e5fee36006b4bf68b97f86b459269606ade730e47fd6
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 17160 bytes
font_01_sfnt_off000107e8.bin
7a3ed88ce934e84593c70944a86904bb0deb993b8975ca168b8346196fd3f077
pdf-font-stream PDF embedded font (sfnt) at offset 0x107E8 10632 bytes
font_02_sfnt_off00012038.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12038 16792 bytes