Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b34b1a4a5e31aa…

MALICIOUS

PDF

84.6 KB Created: 2021-03-19 03:54:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c31890cb821448e150db1fa5f31ccd95 SHA-1: 58cc48f00f36a14d059c2b0c930bf9b8dca9e528 SHA-256: 47b34b1a4a5e31aa6518c1906f0cffbdad16d73a1e7d0b1ed40e7d8ac02a6a00
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 0.9998

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://jacksth.ru/wix?keyword=funny+horror+games+unblocked PDF link annotation
    • https://cdn.sqhk.co/dusivubeleza/Ijfychf/botw_master_sword_recharge_glitch.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/3509738209.pdfIn PDF document text
    • http://youralteragoods.com/what_are_the_four_theories_of_aggressionrfe97.pdfIn PDF document text
    • http://belkwigs.com/meaning_of_academic_performance_according_to5510m.pdfIn PDF document text
    • http://yachts-4-sale.com/nilexaxogf5hxm.pdfIn PDF document text
    • https://cdn.sqhk.co/widexerun/Bjj5Gif/boxcryptor_download_mac.pdfIn PDF document text
    • http://womovenum.sportsontheweb.net/34061275857.pdfIn PDF document text
    • http://tanifulumu.iblogger.org/1229010512.pdfIn PDF document text
    • http://mapebudo.getenjoyment.net/zekezaxovitonuruf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jezagap.epizy.com/98462469624.pdfIn PDF document text
    • http://sitasuwa.epizy.com/jubalukulewufudoxeregari.pdfIn PDF document text
    • http://sozanizitug.epizy.com/kiduvodimeguvufenu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16904808-b2d0-4aff-83ac-eab1ed71423b/tokezilolukufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c99ee19-0569-49bd-9656-a93851694eec/how_to_do_journal_entries_in_quickbooks_online.pdfIn PDF document text
    • http://fopebuzab.epizy.com/heart_piece_guide_ocarina_of_time_3d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b730ddbb-eda6-43f0-84bc-570aefbf9e08/how_to_download_autodesk_inventor_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e62df0d3-94f7-45e2-b55c-75b26c18b338/hp_officejet_4500_driver_download_mac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28B 7360 bytes
SHA-256: 08ab3f9b8a4c366c3443702f4450155a9d07da2d25d93e1a642a74a5485e9fe3
font_01_sfnt_off00010b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B54 5616 bytes
SHA-256: 25bad5f9a42d90e5568594b932397265c9e18f88de6f608499551bf64fdb609b
font_02_sfnt_off00011e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4E 11680 bytes
SHA-256: 38a246276b800c134c871027ebf1d94a70405cba72e1bdd23c4ca38d82b19fd9

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