Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba19f3ccc980e201…

MALICIOUS

PDF

94.4 KB Created: 2021-09-06 07:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 15886f5f1d58d9a745e360d31555feea SHA-1: 76ee2d7d838b0902df77e61c4136be29ba9afe78 SHA-256: ba19f3ccc980e201e2419119047b5e81c5348dbf6f3ba1d225ed3a2762d6bf25
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://full-flavors.com/img/Data/file/33911550597.pdf In PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612615ca47895---726030734.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/ca13f95cac353edcd9a5c5c4ef95edf4/13947070208.pdfIn PDF document text
    • http://mpu-beratung-brendle.de/userfiles/file/setijibonuwiganoxubadel.pdfIn PDF document text
    • http://klenderbio.com/upload/files/65360859612.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/659806229.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/wunofipixakalabupimuvuv.pdfIn PDF document text
    • https://agermag.ro/mm/file/tifotomatusojowoli.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16081f98752c9e---vuvaxepefepowoguzaxukir.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202181518583230.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/sbirr54dasbebil8nkh38t9t3b/28519504032.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160862d0861f71---gulagejedazisowewugorive.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/63602209141.pdfIn PDF document text
    • http://wwstationery.com/files/file/47666254682.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6ef585dda---kapoku.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609876addd53e---26108609091.pdfIn PDF document text
    • http://americanewbie.com/userfiles/file/62092127003.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4cd89c80c5d441e556a0164bf7ebe14c/gezomutaz.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121286fce12e---9407253139.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/8ecbbf341cc9a703a310d6fc27bb7430/57317348960.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3c372b379---daferewugusipumegifa.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/70502491050.pdfIn PDF document text
    • http://elite-nails.pl/Upload/file/79418949053.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210716185658.pdfIn PDF document text
    • https://bnbcostaverde.it/userfiles/file/88919268674.pdfIn PDF document text
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/79260956113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=solving+logarithmic+inequalities+worksheet+answersPDF 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_off00010b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B00 18088 bytes
SHA-256: 05864e15a4e3ac73c21b38edf3e364ea6646a18d04d508fcc1906b9cfbdb1a6d
font_01_sfnt_off000139b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B1 11240 bytes
SHA-256: c7333c75ed500d6b166b9228bc508106f10c8b76f925164fdff122ccaba11bdd
font_02_sfnt_off000153a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.