Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fef7f886a9e21db…

MALICIOUS

PDF

62.3 KB Created: 2021-07-20 15:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: b8e2cb816c7a7eb2cc128d3d34b46f39 SHA-1: 29485e7d7799739c750f13e5b4784ad4caa2bbea SHA-256: 3fef7f886a9e21db4f97e2b44d639aa49f7aeb9ee15301a226eff16c223e61e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution through these links. The file's structure and URL patterns suggest it's designed to lure users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6567

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://nsdadventist.org/FCKData/file/94399425771.pdf In PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088254ad7284---86344575770.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/64814799772.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/2mgi30s972upv49ldo79sqrqpc/wirosuninirevokatevalidab.pdfIn PDF document text
    • http://beytarimcilik.com/admin/editor_resim/file/xajubi.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fc3842876---9844234322.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/88370162ff397c4a512b1db8724dfad2/samavo.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c06ec86a97f---8115685225.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/4669519510.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/bc6f41532b4f011bc9aadd55a73965f0/71237293306.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/17836389195.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609045478ad7f---fumaxelibelo.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/78048157056.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/xiluziso.pdfIn PDF document text
    • https://allianztc.ro/files/file/wisixuwotazuxojegabolew.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7ac824b12---gapapo.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/bbbcf2a801be901b5229f7f21bd19555/9873167060.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/bovaze.pdfIn PDF document text
    • http://jandenzobv.com/image_uploads/file/31422785250.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/16160402255.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/v627qh8r49f2q95c576p2v3740/64397684990.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b38f4283198---64846477762.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/42273712332.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/7626e4cf623872fcaebd538031b9359c/zozijenosibelezexojoroxad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=crab+rave+notes+pianoPDF 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_off0000c045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC045 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85C 10436 bytes
SHA-256: 32abded46cbce06a78a8cb6e1b12d20cc4dd04bf154824c056c67fc8d2b2c52a