Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be06dac35e6a47f…

MALICIOUS

PDF

78.6 KB Created: 2021-09-05 19:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cfa79a2ad12777d9dba47ed61c021d80 SHA-1: 1fa6a57dfbf5230393825205e39129f9bd013c4e SHA-256: 3be06dac35e6a47f85f97e3a0b4944a826013feb504e972f8423f68c6723ae9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ecoevopublisher.com/files/upfiles/file/vojefigenopifuwoxa.pdf In PDF document text
    • http://xn--knstlerische-biografie-arbeit-lbd.ch/userfiles/files/fuwakifamatadetotutago.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/58195872629.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/998c2d1757eba96a19c4020b1eb7dafc/35809800397.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079080f3e4ec---82741939567.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade6143df58---diwawifubi.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/68287333529.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ce4745411a8b937ddfc9d99178926c9/pavonirofeborawaxogev.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbbc470b53---93978873422.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/jokuri.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/67495707936.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/duzusixanabimimejepadapev.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/fiturobuse.pdfIn PDF document text
    • http://kotolantopeni.cz/file/37184087500.pdfIn PDF document text
    • https://primer-spb.ru/files/files/39578507222.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112c47a01607---xelapotu.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8dba526d7c---54828133093.pdfIn PDF document text
    • http://newo.ru/files/files/gimifomorezu.pdfIn PDF document text
    • http://zgic.ru/!upload/files/wadusazok.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/8673966295.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da0c5a87174---sajomikawufetaleta.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/g7g5pkgdsgb8up7vpm9rs1r425/32035925209.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/bikogogovokuwerele.pdfIn PDF document text
    • http://yourbuilding.ru/userfiles/files/bijigivedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=decolonizing+the+mind+thiong%27o+pdfPDF 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_off0000cfda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDA 17252 bytes
SHA-256: 3fb63f5a051a7a91e1de9cb51e67a47363881706d4835c775f400a73be706f59
font_01_sfnt_off0000fc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 10732 bytes
SHA-256: a4db7fa73150b26e6189b232974cebcf381ca02c34a156fa3ff5d1221cd9ea78
font_02_sfnt_off000114b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1