Malicious PDF — malware analysis report

Static analysis result for SHA-256 699a17f801a67d37…

MALICIOUS

PDF

90.3 KB Created: 2021-04-04 19:38:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1d64d6c8e347e23f445fa5a7d3b31fc1 SHA-1: 732aaa10511729d167af51e5e3fca028e3486d58 SHA-256: 699a17f801a67d37fa6ec8b80a930f586772fac6f43df3172951617786a52388
66 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://baarspo.ru/aws?utm_term=how+to+change+a+ge+dehumidifier+filter PDF link annotation
    • http://lumufurisazela.mywebcommunity.org/92305859138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403937/normal_601b48f1257e8.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/54956866123.pdfIn PDF document text
    • http://nokojatagi.mywebcommunity.org/49458414029.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_604d301b6146a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_602c6602f3a96.pdfIn PDF document text
    • http://rasprodavaika.ru/bagetab5jjol.pdfIn PDF document text
    • http://probmake12.xyz/punenodofokuluv33uu4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457006/normal_60401ffb38fa8.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/xefodaxiruwugesetefinodoz.pdfIn PDF document text
    • http://artdebug.site/can_you_remove_drm_from_kindle_booksvt2qe.pdfIn PDF document text
    • http://tepifugamokeg.medianewsonline.com/zavimowubipijuxetote.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451757/normal_603e55ddd57f8.pdfIn PDF document text
    • http://konsalting.info/chapter_2_the_chemistry_of_life_assessment_answer_keysteot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levapoloj.onlinewebshop.net/applied_physics_jntuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/235e1d33-435e-4fa7-8751-3452c356a035/62809935719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f46420c-d435-4859-af2f-8923cf740e99/does_whitfield_still_make_pellet_stoves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/596b89fa-67bd-4363-a199-33379febbe94/volkswagen_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/176b4a1e-79c6-4812-9aef-cafb03c05d28/mavelajetewebivonoxit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/377181ee-f41f-4f75-8c34-d40a75646958/zinonuwutapus.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/bronchial_asthma_treatment.pdfIn PDF document text
    • http://kimawawasero.onlinewebshop.net/rawuvebopudegetevowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/081e7b9f-c955-4fc4-b9d6-0e83db0e6d8e/bozavubapifedabedixokol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1114593f-a068-4c8d-b391-43ce1a7de27b/90592549120.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12277 5312 bytes
SHA-256: 865af34a339c4f7c6ab6b3c145e5d1b2d29acf81a11c370bb7c4c20e43748567
font_01_sfnt_off00013470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13470 11052 bytes
SHA-256: b5509a0c0cccb52a73aa5d525bbe3beebd4515818e746ff0e700bc2ad01c32f5

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