Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4de3a9037b3e19c…

MALICIOUS

PDF

51.4 KB Created: 2020-10-13 20:17:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d1a7fa702e550e09c270325865f8a3ab SHA-1: 0f2a0bb499a0d1c540927e2cd968f30d2d9e5f7e SHA-256: d4de3a9037b3e19c4d796fb9754128eaa1eebd4f52192fe2b76ae0334a5278cf
192 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document functions as a link farm, directing users to various external URLs, including a known malicious redirector. The presence of numerous links on disposable hosting and a redirector suggests an attempt to distribute malware or lead users to phishing sites. The document body contains a search query related to 'shooting plus v3 apk download', further indicating a lure for potentially unwanted or malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • 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://cctraff.ru/strik?keyword=shooting+plus+v3+apk+download In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/kasodopizafazakoxuk.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/dbbd04.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/wozumadaku-mukevewurovebu-nefebo.pdfIn PDF document text
    • https://site-1039923.mozfiles.com/files/1039923/kalulabawefawi.pdfIn PDF document text
    • https://site-1042787.mozfiles.com/files/1042787/vupudiporopegigakuve.pdfIn PDF document text
    • https://site-1039775.mozfiles.com/files/1039775/gawuniz.pdfIn PDF document text
    • https://site-1039672.mozfiles.com/files/1039672/rikadomazazalev.pdfIn PDF document text
    • https://site-1041944.mozfiles.com/files/1041944/5279961354.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7d3707d5d.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/kuwekewugi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce29602-e13e-4267-9bdf-e852c5ffea80/77808490533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17fede2a-af72-4f6b-b3ad-4435d511d4b1/purasexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dff52599-9182-4f91-8f10-b9ff00755370/xapetebamidexakizoguk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F22 5728 bytes
SHA-256: d701b3ec81a1ac7e8f12c1f951b3956050fca154eb5869304743d8fdfcd90046
font_01_sfnt_off000062ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CA 5608 bytes
SHA-256: 7600aa3c9b4b21822726a4492cc7e9e115737bd959c88c5ae9787307d95d26d9
font_02_sfnt_off000075e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E6 10652 bytes
SHA-256: 72a27d73fcab31b77aef79663c2e5cf9946403edcd94e2448dfe0dcf987ce8b3
font_03_sfnt_off00009a85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A85 21000 bytes
SHA-256: 8a8e491c811240b6f68779c155ab06aa885ec8c22f40a9e4a5ad5a091a2b2486