Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5290c440ba7c20…

MALICIOUS

PDF

51.2 KB Created: 2020-10-28 20:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: faf5f391cc36017ca619f2eb10deef14 SHA-1: 902781f3c0688cc96ea6a1c13d6676c0d2e40259 SHA-256: 5e5290c440ba7c2091dc41a4563d246e08294aa5424fef84f63245da1fff794c
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/123?keyword=how+to+get+free+apex+coins+ps4+no+human+verification In PDF document text
    • https://fojumotapikapig.weebly.com/uploads/1/3/4/3/134372119/kuvekajuvuna.pdfIn PDF document text
    • https://vefavufarexuba.weebly.com/uploads/1/3/4/3/134315694/81d18c180.pdfIn PDF document text
    • https://forunevelaviwa.weebly.com/uploads/1/3/4/3/134392474/9639876.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/nisidobesafil-pirawibas-tisolo-xuwawovubimobop.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/eeadd1a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/hyperosmolar_hyperglycemic_state_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/3331/6514/files/87821228149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f871ac90-d535-4b76-8a7d-61012cc3b56c/83143428751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0167d71-859a-4495-935a-018ae318cd28/driver_license_manual_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd773b8b-a354-4f92-a29d-008b8ba47212/xoxelemavojiwitoxawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1783/6965/files/31082970146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9d51831-b3f6-4413-9181-90df13053ab8/online_gba_emulator_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9440/4008/files/los_caballeros_del_zodiaco_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37abd57-fea4-458b-bf42-767902c55346/aprendizaje_basado_en_problemas_carl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8437/0086/files/ragnarok_swordsman_leveling_guide_classic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99ec80c1-7f52-4ae8-9692-4fe74e7cafb7/11213102216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8494/6850/files/mthode_dissertation_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9854efd-8521-4fb0-85bf-75a4ab9c2cd5/sefiruwukilugad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac4677b-2852-43a6-ab77-9eae4ff3e6bc/xapetojakutememufari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3189/5457/files/kinetic_and_potential_energy_problems_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34739ca6-c0e8-4754-bdb5-aa72b0fc9027/32246497194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3e790c1-3483-42c0-a204-ccc53d3f4d3f/feduko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a0f855c-4b3f-4414-a09a-ac7add051629/8323556755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6214585-3f30-4a54-8b29-64427a885cbc/41377500100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7682/8318/files/realising_your_potential_myles_munroe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/1406/0702/files/n_game_2_player.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
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C1 6744 bytes
SHA-256: b29f9350a720d2da9dc50567d08c4a82684db1fcb28a47e3a5788345b392d808
font_01_sfnt_off000089a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A6 5664 bytes
SHA-256: a322d4451f0cd06df4909a8cd13354b2a429b144ab9b11775c1cce5b36a3d111
font_02_sfnt_off00009cf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CF1 9808 bytes
SHA-256: c9c07a9ebff4b89c59fcaa1d5e25f3f56e38547bf1d1b58f74459a47f8db9cb9

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