Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabf384c7ad856ec…

MALICIOUS

PDF

58.0 KB Created: 2021-09-08 01:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 060b5ec328b9509026e65ce059233cad SHA-1: e6fec9a7fe008f235b1a113a6a44e312f0a50c8e SHA-256: aabf384c7ad856ec0fcf2356b18e34087e1b27c5e9db1e1b98f102e3a1b280b2
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to compromised WordPress upload directories, indicating a link farm designed to host or distribute malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and link farm characteristics suggest it's intended to lure users to malicious sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4083

Heuristics 5

  • 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
  • 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://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160796d863a563---vixoba.pdf In PDF document text
    • https://rainbowfurnitures.com/files/files/19030428552.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/13361903302.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/16742018758.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/jexanuj.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/9393645140.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/garobekexinu.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/2309437361.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/69b85f2da61ed026c2769c47d9909d2f/51422945846.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/zogujidinano.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/gisefaxakiza.pdfIn PDF document text
    • https://facades-metal.ch/ckfinder/userfiles/files/5255231329.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/vidibemekudapag.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/wonisufutusemaputaduzuw.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b561be4e70e---95624787237.pdfIn PDF document text
    • https://raljob.com/userfiles/file/77950548936.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/7188434918.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/4q9r7pdnp14h8ui5vdt3nej6g6/71157029793.pdfIn PDF document text
    • http://sartor.ru/upload/files/26366764952.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/vobunepekuko.pdfIn PDF document text
    • https://aaaxxion.info/images/file/83309715408.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/xivupobiniv.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/zudozutasaduzeju.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/kadixanebuzatuwe.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/22961400206.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160abc3294ec58---vasafezorupeziwekine.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2e82e3fb771ed88d141fb474028d99b5/35168780908.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a8b5c6328---2365100686.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=polity+ncert+6+to+12+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cf05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF05 10740 bytes
SHA-256: 113d669c29fbbc8507afd5303036e9f64ddf6b60a824eeab7deeb7efc68ca910