Malicious PDF — malware analysis report

Static analysis result for SHA-256 855b30b4df5bbe1b…

MALICIOUS

PDF

109.1 KB Created: 2021-07-18 00:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: f13cc201229765666c82ecc83a9e05b8 SHA-1: 17c02412b4f8fb520bc912f3e645c9d4a517d67d SHA-256: 855b30b4df5bbe1b978e45442ffb4d145db3a08e820fb110442a4cd57034c499
156 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. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

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://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/c269fccde4f1790f9cee700a27639437/90715586390.pdf In PDF document text
    • https://tpk-m.ru/files/file/24524444930.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/38111633453.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1608878045922b---88291389684.pdfIn PDF document text
    • http://verypool.cn/images/upload/File/sebop.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160aadf50e78a6---93318841154.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/pemafavanonalozujad.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/125e1f260532080b924401c9198a74f6/kafedopo.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/22188935519.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a96dc417c41---gopalegifafuladolinagu.pdfIn PDF document text
    • https://memoservicesrl.it/file/4785295855.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f0d1b15f3---68471856747.pdfIn PDF document text
    • http://capital96.com/userfiles/file/zuwiwowezomunava.pdfIn PDF document text
    • https://capecoralliving.com/media/file/jisonugofepubetusanerux.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/990da089b8ffca1782385807385fe015/31793963637.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/fb437ed1f1a7a4f7637adf6c4de16fea/jusiz.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/31487779300.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c03d885f499---fugogegotojumenaxeruma.pdfIn PDF document text
    • http://vrtaspol.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/66734469613.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/495td00nntok79k2l359mllg5m/68857069359.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099351e86827---29975409521.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/64004065357.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/rozinilu.pdfIn PDF document text
    • https://viessmannboilers.ca/fck_upload/file/jilejim.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/p980m0604fhg8p8lbhtfo8kpl6/80545507773.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cc8fadd8492---perem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=what+do+you+mean+by+proverbsPDF 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_off00014885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14885 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001609c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1609C 10932 bytes
SHA-256: 86aba423c4f7b5817f5105028bde9062c4716931b144c622076bca2c3d052df8
font_02_sfnt_off00017993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17993 17352 bytes
SHA-256: 6f6314c38123e32d6725ff1f065a8877bf620b572be3f42e5024610cdaa63e73

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