Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1943be9405bd7d0…

MALICIOUS

PDF

83.2 KB Created: 2021-09-01 20:37:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: c07ce044a7fa53a5d3974e0520497076 SHA-1: 4caa635729ecff53b8049d4223a1490529c32fba SHA-256: f1943be9405bd7d00c6707255a980206bfda5b0dad470a4736225c9b9e050bd1
64 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3358

Heuristics 4

  • 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 https://philabc.ru/uplcv?utm_term=into+the+wild+full+movie+free+online+watch PDF link annotation
    • http://aeronautike.com/userfiles/file/gubogebaxomijejufoz.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/36575951616.pdfIn PDF document text
    • http://brlairport.com/images/file/noranajitufin.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/e010634610eb19f6be0cb8a7b5cff939/jotutoti.pdfIn PDF document text
    • https://rajaketiga.com/contents//files/fopixupiwejoduv.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161190eca6a738---15154078120.pdfIn PDF document text
    • http://nessie-vinylcare.com/file/63483493376.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/pufodeduvufudobawo.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/xexavame.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/edc3folvp8mv10s9ahcbss6p75/rakedukeledutor.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/12525939541.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/sasobavowosiwijalitepodek.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/59fef5a0c655658fda1a409e2e3a9096/85895808447.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607985557af88---lagejax.pdfIn PDF document text
    • http://melabo.com/upload/files/38836585085.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/zitefaxelimuvatela.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/kugizenegonakuleden.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b097ebeb10---55183346642.pdfIn PDF document text
    • https://whitesal.com/data/images/file/6085_20210516125855.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/32848274383.pdfIn PDF document text
    • https://vegastel.eu/components/com_mijoshop/opencart/image/data/files/71246943961.pdfIn PDF document text
    • http://fteq.ru/files/file/90790166076.pdfIn PDF document text
    • http://originalcheck.it/public/img_admin/file///vomevavefapamov.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 10776 bytes
SHA-256: e3f5435cb9a9e332201495bcf7aa44467f14c96958aa7a88f538cd1a3da4c9a2

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