Malicious PDF — malware analysis report

Static analysis result for SHA-256 7738774685dfa2d8…

MALICIOUS

PDF

83.7 KB Created: 2021-09-01 13:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 49fd6bd91e30cec1e37471352b1ff764 SHA-1: 00e5c2374ab0d230dae12ef38d52f9e312201ec0 SHA-256: 7738774685dfa2d846c8629495f17c57c2b79bc32b25565d3bdf6167e3841907
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f0f9307476d5a6b7db4a0fc691ff40c6/11036352053.pdf In PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/68f7658a1edd13d27c0115ded19bfa42/kadomif.pdfIn PDF document text
    • https://kitapkaplama.com/upload/ckfinder/files/32725374152.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/f5660d9fd7e561b58df584a11395e62f/79479657276.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/73047460274.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760db3c5721---nakexalemir.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef5bcb2c92---lujolubukitojevadokowib.pdfIn PDF document text
    • https://dalyanestate.com/userfiles/file/mukugu.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/93848512421.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/14726971815.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717af392ff1---rusowatitekixu.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/kufupos.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/37201e493ee4e6eac36a41384f3b6394/65468180378.pdfIn PDF document text
    • http://mariancozma.com/_user/file/56488093110.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c12dca04e4e---noson.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/3983123675.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/26725843067.pdfIn PDF document text
    • https://goldenapp.net/file/74418642236.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/c5a969705ccf8f6b40a755a7274182b4/84913656974.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c71683e1c9---lixagofakisepuwalalur.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/raragimebime.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/53679758008.pdfIn PDF document text
    • https://eastmanllc.net/ckfinder/userfiles/files/fikutaroboletelabibijamav.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/sufimarojawajikuf.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/5e6ae6672293405a029505fbaf6f1667/xozixefovabo.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc18ec1cbb4---70617717016.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=online+dictionary+english+to+malayPDF 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_off0000e518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE518 10956 bytes
SHA-256: 3cbf1bf86c0da77cd218cfdcb8dcc29f32580ff3f8018d5e401b68936e2d3ecb
font_01_sfnt_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 16384 bytes
SHA-256: 7ebd2d93f5bb4424c602ca5a88cda2682815738808421c8f4a74a5765fa5ed4d
font_02_sfnt_off0001283f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1283F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1