Malicious PDF — malware analysis report

Static analysis result for SHA-256 7817de9974085063…

MALICIOUS

PDF

89.0 KB Created: 2021-06-27 03:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 699227c0f4afddb2a1fa202733ae17b0 SHA-1: bef57da5795d76b0ce580f7f0f0215c31a93b97f SHA-256: 7817de997408506369dd98cda73ff600da0ce05c834915ff701abbc06d263aa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://drafthe.ru/uplcv?utm_term=bibliography+card+example
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9470d6a77---23992468889.pdf
    • https://menu2uplus.com/images/file/72255768485.pdf
    • http://fitnessklub-impuls.pl/uploads/assets/file/jekipolikinobexukanub.pdf
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/gegofebinaneg.pdf
    • http://agendatourvietnam.com/hinhanh/file/89677770558.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a2b17e07e3b25ffaa98b97fec5aad0cc/85889634520.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a08bf7ff2d---gizinapomumuf.pdf
    • https://bancodevida.com/bancodevida/admin/images/image/file/34283750207.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/285ddf794446f440e0e76db6fad4f98c/45408824792.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16073e8a084f9d---wazepigigusajoxoze.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb22068399---dumilanatenojixumaguki.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/a529f03476d26b677856211882b70524/xubadalikofonok.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc482eb751---81129663423.pdf
    • https://activepymes.com/pub/file/kakejomitobugaxi.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c7bc516869f---jilekefevagapigogivoronab.pdf
    • http://detskaoptika.cz/ckfinder/userfiles/files/55970215149.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce2e4639bc2---31043535705.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/6c03dbf0dcea5acd61315f8805980d9f/13203182519.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/da77a55416035808fe49219467045ef6/jenevagovuxurigexebu.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/182079e4b937ec1f2bfc0ce64ac67086/nazosebimiwab.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb66cb751a8---tugaboxinanazoranin.pdf
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/e0nl4959snmf1an5nf6utac8h6/29922175551.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/mh72tgum3c6kku989rabujo267/xugutetagowo.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcaade40b1---kivokitezimorimivato.pdf
    • 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_off0000f9dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DD 16792 bytes
font_01_sfnt_off000111f4.bin
38e0c06a1125b3ce8113808711fc8059e2e90705afcfdd186ee81d9854703acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 11000 bytes
font_02_sfnt_off00012b16.bin
e9197e2c3d92e0a665c35216d7fce3b0552ede31732ef1a520f15ff76105f13e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B16 16780 bytes

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