Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32ccf4c07a35c23…

MALICIOUS

PDF

82.4 KB Created: 2021-08-09 03:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 144469dc595d23b5410fc6009119efba SHA-1: 9b5adf3ff0bf774ec6f7a477c425eb81ea187eae SHA-256: d32ccf4c07a35c2376bbcd8d64fe77f677e49676929ed3ff23e083ac8d1d2885
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure as a link farm on disposable hosting further supports its use in distributing malicious content or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 6

  • 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.
  • 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://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160acd1fd5e1ac---mivawepexadejuwukofiduzag.pdf In PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/sivexuxidajejirituzu.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609de7ee71094---94882197215.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/jegazotibajad.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/rofenafafilomefipuxux.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/sr884b19gbqvgq1nii6qe5qsql/32479939439.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/turuguzejufinekamom.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a6cd8d905---livobabat.pdfIn PDF document text
    • http://elrey-uslugi.ru/media/file/42354635252.pdfIn PDF document text
    • http://bellina.pl/userfiles/file/9095668403.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/7ecbe7b8dfa744f187cce597d558c58c/74412016204.pdfIn PDF document text
    • http://climtech.com/files/files/zimogol.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1928540f98e59754b884740e6514fb8c/88283588042.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/velobarudonumilim.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/43097965717.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/12503140271.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/sode0j1sdjdch2agagbl87ab5f/33989283023.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/wugefuxijiwozameravate.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b313f216ada---sidobusuvuxidamepewob.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/dea49bf73a78cf14a200c7d3d1f0977f/56241842570.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/fonaronafira.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/vufaduronuxuwusasesipi.pdfIn PDF document text
    • https://europartner2.pl/uploads/fevajig.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/febekogedofosujamobiw.pdfIn PDF document text
    • https://ntct-dz.com/ckfinder/userfiles/files/mobotobizapinu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=dil+hai+tumhara+full+movie+free+download+480pPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE082 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825
font_02_sfnt_off0000f596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF596 11256 bytes
SHA-256: 7fe7ab8b438b03f15542f85bdcfa6c74a023743d19d018ac012e30b5ae8dd8e5
font_03_sfnt_off00010fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD9 16608 bytes
SHA-256: ce66e86ace965bcf8152d613a24b0914e042840f9613950f59a286065620c252

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