Malicious PDF — malware analysis report

Static analysis result for SHA-256 488c2d9a2990fa01…

MALICIOUS

PDF

95.3 KB Created: 2021-07-23 01:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f2ffecb54580df19e4a504140f902963 SHA-1: fdf92a40b39335d853db6e039fed10bb87bc3a17 SHA-256: 488c2d9a2990fa0116ed013e71467c3ca78b3da996e6648ab08d3ac3b78c4cc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure suggest an attempt to distribute malware or conduct phishing attacks, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab88f024bf1---6410555803.pdf In PDF document text
    • http://teresachild.com/upload/files/fubodoxanirapokusedajakap.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/bibidamodepotufo.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/5a35300c569c183e173bb78771d6c225/14526425861.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/xekorewedifakapenunileji.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/78160140873.pdfIn PDF document text
    • http://charontrade.hu/data/file/galirevaxon.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/luzovuniruwipaxoxizumebo.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe40ad61ac---vozolabuzizuputorato.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cc0844b77---vagunasebejifisedejog.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa1d9814da0---zisejaverip.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c4cee0332---majelotonubos.pdfIn PDF document text
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/gevitinalel.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/41751865635.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/64841962170.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/80994362398.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/cc122ba77cd3e948310d3b6ac6c971ef/48227129746.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/bb850cf2c09f5a36d94e0b469fdcac4b/sapadumorakowesotela.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607818d65bd30---kolexanamidexujigerulij.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/vgqqvp657a1uj4bdr31r4a9964/binaduj.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/99579583925.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/kqqgqr8uhrvnkoqpl2502aalu8/jakasewekiwawop.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/51329287102.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=meaning+of+mistrial+in+lawPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 17160 bytes
SHA-256: b8122d65a63e2a147c4bbab25a1da0c83d92ff0332920db150909ed45e0becee
font_01_sfnt_off0000fa37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001124e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124E 10636 bytes
SHA-256: ca5a75900bfdb4729e91ed1083a7097731ffe251aaeeb2b00f75745085315661
font_03_sfnt_off00012aa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA7 2956 bytes
SHA-256: d35eac8061f3528ab41f2d721b859e9bf01c5ab3865044abb163b61e8fbd9e1d
font_04_sfnt_off0001368c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1368C 21376 bytes
SHA-256: 52cb640414c063cae7ccf575b8f2ba0d916d4900aea796051935bff63c6be22a

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