Malicious PDF — malware analysis report

Static analysis result for SHA-256 7398469ee63ff82b…

MALICIOUS

PDF

141.6 KB Created: 2021-05-30 00:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b0ae8e93b56d450108d3fb8826e706d4 SHA-1: 5e96de6b7355255262282f4587e7501771784445 SHA-256: 7398469ee63ff82b4ff7578598ea814f1f0aa7d27d85c89148a3001e051a2d50
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to host further malicious content or phishing pages. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8666

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://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ca6551d79---wotunimekemumesuvefuz.pdf In PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/8eb9041d299017271906322ad4ae9d39/puzurutewesegugapin.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607797830ff62---50688633409.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/eaa0c6af63814c18e63a82a4274d2afc/tekapolowifefumifaz.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a27dc44e96d---vopivirobirulugoxovofe.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/40ffb574b2017e4907e2c35940b5efd3/21429208274.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/da4f40467cf2b1006d3eb54501e2ba59/fufovuwapagigasawibabudu.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/b747599ccf0c066134a7502d232ab7e9/salokox.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/ptjofgn8l0dla183k89rgr8l60/85615624899.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/aplfkl26s0j6jh6h56bek54ova/90569263045.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/34919988284.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607e837b98a04---rukulakodoxiwefun.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6bc44764f---nujosolanijewenutomukila.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d95fe8b6e7---71296687354.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e5cfdcf84---lezufixeninodojixosovupal.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3cae17844---88669123244.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aab9fcef787---dojitiwite.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/lb53ie8ml1v8ftkg5ad95hn5m6/jozupokegekalipizofaxipi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=tsum+tsum+toolkit+not+working+2021PDF link annotation
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cdf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDF4 6588 bytes
SHA-256: b3260a8b27c40a1c9408c40b3dcfb9ec9ded560232013cbc1ca8de37ebb5a831
font_01_sfnt_off0001de6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE6E 5228 bytes
SHA-256: d52554364d8cd4bf418cf8a13752ad14fd21ea5afa0a3b58173ec0b8df27a915
font_02_sfnt_off0001f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F038 4900 bytes
SHA-256: b70df78a04f449f8ce90423c226df8bf31d89eb8586cd0e46d6ab69963bc0fc5
font_03_sfnt_off0001fd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD80 11928 bytes
SHA-256: 7bcb6715f4615b23f3c0df506f76e5ff53afbf7e0f02ccd9fa6cb0c1fe8a02ca

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