Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2b7479fed5c027…

MALICIOUS

PDF

47.2 KB Created: 2020-10-28 12:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8096f72230ba49600c9c5db437f74e05 SHA-1: eb70259cd7eaf7c1583c446dfb94a50a409afedf SHA-256: ed2b7479fed5c0274a8b35efea33570ac59419856bf952891414a222722ec57f
162 Risk Score

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to drive traffic to potentially malicious sites or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=legendary+game+of+heroes+strategy+guide In PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/zamodiwonofurigum.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/15ba21d21caf.pdfIn PDF document text
    • https://kozezivu.weebly.com/uploads/1/3/4/4/134444222/taluri_xezunu_bexoraxu_kedokufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/sow_thought_pathfinder.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/14153644745.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/8029159634.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/january_2018_chemistry_regents_answers_jmap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432caa67-a860-4b86-a06a-57d40ed3d857/42985536353.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/lupaditomadedud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/0623/2229/files/vusubola.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/english_for_life_beginner_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/8212242452.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/alexis_de_tocqueville_french_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9beac364-f8f0-4a9a-829f-39371e07ea00/24292919618.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/print_web_page_to_as_it_appears.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/ssh_rd_rev04b_iphone_5c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9fcf8f8-6512-4666-826f-0a53d810ebf6/25811545384.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/1974/3644/files/zurujonilazanojoz.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/70937361780.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/89515247156.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_off000079c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C6 5332 bytes
SHA-256: 347c8d36f5296d21490074f511fc4004ae6ff3003d8afee90478d9c64ea46a4d
font_01_sfnt_off00008bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BD3 10468 bytes
SHA-256: c0f897874644e4eb3d4ea89557928d4d5a6bcda99107066085eb8d6fc95702ae

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