Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dadcba198d5d53b…

MALICIOUS

PDF

84.0 KB Created: 2021-08-11 01:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f05640088dd665ca6b8da69643ee900e SHA-1: 183f9f19610cbbfd54346a99f532b666d0ba883f SHA-256: 5dadcba198d5d53b9d00258ce7ad7018ed5388746b0bbea6038589d0fdc915a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised CMS upload directories, suggesting a phishing or redirection attempt. 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 a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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 http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d53a963621---vosawuloxijagog.pdf In PDF document text
    • http://montoaneli.com/ckfinder/files/fexodukibajaludivop.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/43939436546.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/79610052568.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/1167415443.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/sotawudofumoxuridogaji.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/90b538a66faface734afb78c3d0ef2f1/63060898573.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/bopofodudaniwog.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/0a3e1538e1edb2fd976c024c054b47fa/nilabumezivo.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f6200da5c2---jipilibip.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/9592c65281e1ac071de305357326a4c2/59555177409.pdfIn PDF document text
    • https://hzautomatisering.nl/userfiles/file/fenenedurobosol.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/mesozaxawived.pdfIn PDF document text
    • http://shesob.com/file/files/sogefirip.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/bolitoni.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/cc9450485f7aa593b596505b1edcccd4/ramurixikedekod.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160700b007ea5c---jimarojatidurefu.pdfIn PDF document text
    • http://dwallacelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92612374909.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/97249601589.pdfIn PDF document text
    • http://tafoto.de/img/upload/files/xixejudovejepuvu.pdfIn PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/ronexifub.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/abo06chqet8g6iiatk354bqv06/fukegavikolukemela.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/3429920186.pdfIn PDF document text
    • http://high-keenltd.com/userfiles/file/xusivujebeja.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/8959c74539b9e2f2a245e311744e2b70/37596429465.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=h%C4%B1zl%C4%B1+ve+%C3%B6fkeli+7+t%C3%BCrk%C3%A7e+dublaj+full+izle+tek+par%C3%A7aPDF 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_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 11376 bytes
SHA-256: ede54723e501d2e70da7a1a75be071ddef05e17aed79f48bbeefcb7a349a11e1
font_01_sfnt_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDB 19340 bytes
SHA-256: 381c14e95dd69c8fa23a0c8f30adde817cf7a12cfc247e18fad8f702401eafeb