Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4298a906947bf49…

MALICIOUS

PDF

96.7 KB Created: 2021-06-29 09:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67b5b672c73758c7c1e24bba89500e79 SHA-1: 761906eead15d3d31115447a7379fe2afca7107c SHA-256: f4298a906947bf49c38739dae6ca3d97a208c93c493a2e95697fe5e9a8ba6362
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to other PDF files hosted on compromised websites. This pattern is commonly used for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec14f9fcf9---lulumujikilo.pdf
    • http://atdawnwelift.com/userfiles/file/jinazapenowivimefab.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/3mqvmu25n3nuo9avll775cj32n/duvurupetutowa.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/163135b53166d1f15e5d69609b5fcb05/15307438890.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ffdcf7aa70---75130696679.pdf
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/spb72512r5m4upr1vtov5ig51g/betesakelofugaj.pdf
    • https://implant-drill.com/userfiles/file/lirakuxelunironud.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ec48798cb---35454080743.pdf
    • http://lawngo.net/fckfiles/talikonukapabilusok.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/0d7938d18590f7a9ef0d0ceae48bfdf3/lividufomaxizowofulaja.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609419870913e---disomato.pdf
    • http://kusadasidentalclinic.com/img/userfiles/files/27609916074.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/272383cd36ac8f72d0438a8498c29497/kuvefajaguvafe.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/c3e1c02822dcdf4c51fe7d907a52d2d2/lususi.pdf
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/80051689116.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e21bf51455e9d007c0cc3aeae31d083b/83944044231.pdf
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cea85d226---98183379796.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/6e43056882c6913b3a801fbbd4651c24/68250244192.pdf
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/182079a77cd3a6427d65ddc2aaee1b78/fowugelepulezuvikeziwa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=neet+official+answer+key+2020+by+nta
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011385.bin
53b3bc35b171071120b167c3aa956098198bd3d64f9c47563ea1e091d3d526cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11385 17748 bytes
font_01_sfnt_off00014269.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14269 16792 bytes
font_02_sfnt_off00015a80.bin
bb118e99f3078c7789b2c07e8f8482a4068e6bcd8fcdcbd0d409ab062341f891
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A80 10980 bytes