Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5438f6f47ed1207…

MALICIOUS

PDF

95.1 KB Created: 2021-09-03 23:32:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 375f02e396812386c0d34e34e5edda93 SHA-1: 97c976fb76b7b92e922aff23fddee874ae12e6a4 SHA-256: e5438f6f47ed120789d60054a37a89dbcf5ef2abace9f06bcc79ae6255cb4f56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://inwebjor.ru/uplcv?utm_term=peggy+porschen+book+pdf PDF link annotation
    • https://steammining.com/userfiles/file/62653352091.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/kegijutuziguniboxinikusi.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/64127563670.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/083727a8d474fd68c1a9ee453f8edd19/27594415642.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/64043337766.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/68697621775.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/pajirusapibokubeki.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16092f9b463f4a---41364219557.pdfIn PDF document text
    • https://activepymes.com/pub/file/3622589899.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103e741855b4---banen.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b1f2b9116---92746683481.pdfIn PDF document text
    • https://rajakedua.com/contents//files/60211732307.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1627804735.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/1q9hse7f5417cm0lvekgb18pb3/tirojitoguvakuxe.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/e2ceadsafri66jv3ptm2fg14b4/43465440228.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c5c64e61a---87219254088.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/83782514009.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608507b06da86---miguzixunomegav.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/9cb58a3f6b5403f7bcbb74732183392c/48961272161.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160986b73aa79c---89398969965.pdfIn PDF document text
    • http://tochuchoinghi.org/files/93396627408.pdfIn PDF document text
    • http://gchs1969.com/clients/867877/File/22230842196.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/72013872559.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b0ca57f10e1---87289178831.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/8b67f895a500eb10132d89216ebfa4c1/nevegefatoxukituvovame.pdfIn PDF document text
    • 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_off00010e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12631 18200 bytes
SHA-256: 354c69d01660e81cae95c02d61c2ea23f4f9ede8ebf0a436c346bafd93e0438d
font_02_sfnt_off00015631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15631 10848 bytes
SHA-256: f68d94156cdad4366636a480449eba092dbb040406dd6d49d4f299d026ad0f38

Open this report in the interactive analyzer, or submit your own file for analysis.