Malicious PDF — malware analysis report

Static analysis result for SHA-256 30690ef96ddc90e2…

MALICIOUS

PDF

85.3 KB Created: 2021-09-12 19:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5fe1044b77a493bdc18824a3a4edc9a7 SHA-1: 8e8c3cd04630006a021515a2d94dcc254985c78d SHA-256: 30690ef96ddc90e20c4f35510d7989ae5644ce154aa1d499055d5900862df720
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 are part of a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://anakmeong.com/contents/files/nedisudegan.pdf In PDF document text
    • http://kochamsushi.pl/UserFiles/file/59601747537.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/jimubujigegopowepokali.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/5dbf0fdde62e0f6c1536cf6669823d15/bedala.pdfIn PDF document text
    • https://odlingfamily.com/userfiles/file/zidute.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/wifikinamizokipuluwosiwuw.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/161386d8a87d58---105604958.pdfIn PDF document text
    • https://kingwaterpure.com/ckfinder/userfiles/files/67163249229.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/mipimiv.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134a63659bd5---gupexojipapupurufepusor.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210904_3F99998CD4E9583F.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202196174464041.pdfIn PDF document text
    • https://xn--80aesyq.xn--p1ai/files/file/86789532525.pdfIn PDF document text
    • http://metabolizmusonline.hu/images/upload/file/navawogukemixipaviz.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/82990545292.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/33542193744.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/radotakibepusewuvonebeko.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/67b2359b24d3ba11fef8453fe7f0e1c3/67731368714.pdfIn PDF document text
    • http://kythuatviet.vn/uploads/userfiles/file/fujaj.pdfIn PDF document text
    • http://www.serenissimaservizi.com/files/74145677716.pdfIn PDF document text
    • http://xn--e42bt3l.net/upfile/files/venaparitagilogukisag.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/delesogip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+change+my+icons+on+my+android+phonePDF 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_off0000e5c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C9 11104 bytes
SHA-256: 1d15c0e9926ecc5812f3ab143645ac18eeb5c876664de0393fc12f270c81ed2d
font_01_sfnt_off0000ff51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11763 18544 bytes
SHA-256: d8bbf37b6136524966f9cf08b45662c4f2483024ae3a06da9e28ca0481902eac